Blog Archives: WildWivenhoe

Guest Blog: Jude’s Rubbish Diary – Episode 1

21 February 2019

It all started with a chance meeting with a friend along West Quay…there was I, armed with my litter-picker and helpful bag-carrying husband…when she suggested I keep a ’ Rubbish Diary’, recording anything of interest that we discovered on our regular rubbish-clearing expeditions onto the marshes of Wivenhoe.

So here goes….

Episode 1.  21 Feb 2019; Seawall from West Quay until it joins the Trail

So, what did we find? A few items along the path itself, a helpful dog-walker kindly retrieving some things for us to dispose of.

And on the salt-marsh of course plastic in its many forms – bottles, lids, straws, syringe (but thankfully no needle); together with glass bottles, cans, crisp packets etc.  Many of the marshland plants had a covering of small white objects. In the same vicinity were chunks of polystyrene in various sizes, so we were concerned that the white deposit was this disintegrating, both unpleasant and potentially dangerous to wildlife.

We took some samples home and following examination with a  hand lens think that much of it is dead, bleached duckweed leaves from further up-river, together with other germinating salt-marsh seeds.  No reason to be complacent, but hopefully not such a bleak outlook as we had first thought. And at least it made us look closely at the tideline deposits, which revealed their value as a food source for seed-eating birds.

An interesting (though out of reach) discovery was a yellow rubber duck. Possibly a bath-escapee, but did you know that in 1992 28,800 bath toys were lost at sea on their way from Hong Kong to USA.  Since then they have been washed up on shores around the world, assisting the science of oceanography as they went.  Could this be one of them?

 

The Beth Chatto Garden through the seasons: February

February can be the cruellest of months. Spring is on its way, but so often just out of reach, held at bay by gloom and cold. Not so this year: mild daytime temperatures, often cloudless skies, gentle southerly airflows, and barely a trace (yet…) of ‘normal’ winter.

Our monthly venture to Beth Chatto’s was on one of those wonderful days of ‘Spring before its time’. After a winter’s dormancy, Nature displayed flagrantly to our hungry eyes – never mind the flowers, everything looked fresh and enticing, whether set against an azure sky….

 

…. or covered in mercurial dewdrops….

….or bathed in dramatic shadows cast by the low sun, throwing the saw-toothed leaves of Melianthus into sharp relief….

…or igniting the shreds of Paperbark Maple, as flames licking their way up the trunk.

Of course the flowers delighted as well, carpets of Snowdrops, Crocuses and Aconites sweeping colour through the garden:

 

The spring flowers en masse sometimes overwhelm the senses, both sight and smell, but such has been the dearth of flowery photo opportunities since last year, each flower beckoned, almost straining to show off its wonderful inner landscapes:

Even the less showy flowers have much to reveal in close up – witness the yellow pompoms of Cornelian Cherry and the translucent jade bells of Spurge-laurel – and of course getting up close and personal for a photo also highlights their fugitive scent, often lost among the brash wafts from the likes of  Christmas Box.

All the spring flowers have one function, to attract passing pollinators – sometimes in short supply – to their nectar and pollen resources. Look closely at a Winter Aconite and the bounty becomes clear: yellow petal-like sepals surmounted by a ruff of green leaves, embracing the pollen-bearing anthers and crucially the cup-shaped petals, in this species modified into nectar-pits:

And today the investment in flower resources was paying off. Despite cool overnight temperatures, all sorts of insects were on the wing and raiding – hopefully also pollinating – the flowers: Queen bumblebees, Honeybees, solitary bees, hoverflies and other flies,  amongst others….

One hoverfly gave us the runaround in identification terms, looking like nothing we have seen before. Nor like anything in the books.  So it was the internet which came to our rescue, showing it to be the unusual dark form of the familiar Marmalade Hoverfly:

But best of all, if only for the gruesomely-minded, was spotted by Jude. Her insect-eyes,  under-employed over the winter, latched onto the form of a fly at the very top of a spindly sapling, about 2 metres from the ground. In close up, the horror revealed itself: the fly had been devoured by an entomopathogenic fungus, now erupting from its abdomen and liberally producing a halo of spores, each potentially a death sentence to a passing fly. But before the end, the fungus takes over the mind of its host, changing its behaviour so that it crawls to the highest point available, all the better to be able to disperse the deadly spores into the wind…..

 

A New Year springs in the Beth Chatto Garden

Just two months since our last visit to The Beth Chatto Garden (see blog here), and it is as though the winter shutdown never happened…indeed, thus far it really hasn’t, with barely a handful of frosts interspersed with unseasonable warmth. So it was no surprise to see those traditional harbingers of Spring, Snowdrops and Winter Aconites, in profuse bloom.

Being an insect-pollinated plant at this time of year is a rather dodgy strategy, given that insect flight is severely impaired by cold temperatures, but the flowers are still appearing, in the hope of attracting a passing early bumblebee into the illuminated lanterns of Spring Snowflake or the rich nectar-pits of Hellebores.

Some flowers advertise their wares visually, others by scent. And on a still winter’s day, the pool of fragrance surrounding the most extravagantly scented can and does stop us in our tracks. I challenge anyone to walk past a flowering Sweet Box without being uplifted by the olfactory promise of warmer days.

One of my favourite early spring flowers though is notable not for showing off, but for its demure flowering, requiring a search through severe spines, such that every one you find feels like a prize. Butcher’s-broom is showy enough in fruit, large red globes from a year previously, but its subtle flowers are each a gem. Three-parted, signifying its liliaceous ancestry, they are placed in the centre of the ‘leaves’; we may call them leaves but a developmental botanist would call them cladodes, in essence flattened stems, hence the oddly-positioned flowers.

While the new season flowers stole the crystal January limelight, and the previous two frosty nights no doubt kept insect life at bay, a few winter gnats danced in the still air, and a single, nymphal bark-louse demonstrated that Jude’s close-up vision has not suffered from lack of use since the autumn! Add to that a sprinkling of perennial fungi such as Diatrypella quercina, and it is reassuring that, irrespective of the turbulence of political life at the moment, the wonders of nature will keep on giving.

 

Autumn at its best in The Beth Chatto Garden

The burnished fires of Autumn were rampant under crystalline skies as we strolled round Beth Chatto’s today:

 

Foliage and fruit – a colourful feast for the eyes as well as the hordes of berry-eating thrushes:

  

Usually a feature of the autumn, in common with most of the droughted south-east it seems, fungi were few and far-between:

And the remaining flowers: some expected, others more surprising hangers-on from the summer, but all valuable sources of nectar or pollen for late-season insects:

 

But amazing to see the number of insects on the wing, a nod to the wonderful summer past and a promise that the days will again be getting longer in just six weeks’ time. Hornets, Red Admirals and Common Darters are perhaps to be expected, at least until the first hard frosts, but Caddis Flies and Willow Emerald Damselflies? Strange times are afoot as the seasons disintegrate…:

 

#WildWivenhoe Botany & Bug Walks: October – King George V Field, Wivenhoe Wood & Ferry Marsh

‘Season of mists and mellow fruitfulness’, yes, Autumn has crept up on us, and today we looked at some of the ways nature has been able to ‘fill all fruit with ripeness to the core’.

   

A visit to Wivenhoe car park may not be your first choice for a nature walk venue,  but a quick look at the shrubs and bushes soon revealed that even there nature has been hard at work producing berries and seeds.  Colourful, in an array of shapes and sizes , these are all intended to be noticed and eaten by birds and other wildlife, therefore enabling the plant to be multiplied and spread further than could be managed by just letting its seeds fall to the ground. Of particular interest were Berberis, Snowberry, Pyracantha and Viburnum, with Rose hips and festoons of White Bryony.  Hollies were there too, some with and some without berries – the reason? Well, it is the female that bears the famous berries, whilst the male flowers (on separate trees) earlier in the season provided the necessary pollen to fertilise the female flowers, leading to the formation of the berries. Lots of ideas here for those wishing to improve their gardens as a resource for wildlife.

  

It was interesting to walk over KGV and see how the now-cut ‘Meadow’ is faring.  This year’s ‘experiment ‘ in leaving a small portion of the field unmown for a few months proved very successful,  the sheer variety of plants that sprung forth, and the benefit to butterflies, bees and other insects has been enormous. We trust the Council will allow, indeed encourage, this to be repeated next year and beyond.

 

We had hoped to find a variety of fungi today, but a reccie yesterday was disappointing (due to lack of rain over the past few weeks) so we spent only a short time in the woods. A Parasol mushroom was seen on the edge of the wood, and a patch of Honey Fungus on a dead tree stump further in.

We concluded our morning with a walk through Ferry Marsh, following an incongruous peanut trail! It was interesting to see how the marsh has fared through its unprecedented period of inundation this summer.  It was good to see (and hear) the Reeds thriving on the re-wetted marsh, and just bursting into flower, as well as discover a few other marshland plants, including Sea Club-rush and Redshank.

 

The small oak on the edge of the seawall was rich in galls – Spangles, Silk-buttons and Smooth Spangles, as well as Oak Apple and Marble Gall. Each of these home to minuscule creatures, which we can only identify by the shape of their gall home and the plant on which it is found. At the foot of the tree was a tennis ball shaped  Earthball fungus. When prodded this puffed out smoky spores: we had pre-empted the rain drops which were soon to fall and which would do the ‘prodding’ naturally.

What of the bugs promised on our walks? Well, given the cold and damp conditions, most creatures were tucked up in the warm somewhere, but we did find a few things of interest:  Dolycoris  baccarum (Hairy Shield-bug), a crane fly complete with gyroscopic halteres (modified hind wings), several newly-emerged caddis-flies and large Garden Spiders, everywhere, waiting…..

 

All the photos in this report are our own, but due to the poor light today, most were actually taken in more favourable conditions!

Thank you to all who turned out on this less-than-nice day, and to everyone who has supported our Botany and Bug walks this year.  We hope to offer a new season of outings next year and hope that at least some of you will be able to come along.  We may arrange a walk for November if conditions are right, and will advertise it accordingly.

#WildWivenhoe Botany & Bug Walks: September – Grange Wood & Whitehouse Beach

 

The sun shone and breeze was pleasant for our walk this morning: thank you to everyone who came along. The main focus this month was the various salt marsh plants, found both along the slopes of the sea wall and on the marsh at Whitehouse Beach. Each is specially adapted to live in the salty conditions, some by virtue of their fleshy, succulent, leaves which preserve moisture (e.g Marsh Samphire and the Seablites), and others by processing salt water and excreting the excess salt (e.g. Sea-purslane). Many of the plants we saw are members of the Spinach family, the most halophytic (salt-tolerant) of families worldwide, mostly edible, and all with unfortunately ‘subtle’ flowers…..

…but there were some species with more showy flowers, including three oft-confused members of the Daisy family: Golden Samphire with yellow rays, and occupying the upper tidal limit, and Sea Aster, in both its forms, one with with purple rays, the other lacking rays completely.

 

Other plants included Cord-grass, in full flower with its feathery pollen receptors poking out, leading to a discussion about its unique and really quite recent formation as a species (come along next year if you’d like to know more!). Likewise provoking a chat about the sex-life of (some) flowers, a Hawkweed was flowering in the wood, and along the highest level of the marsh, Common Toadflax was in lovely flower, a special plant for us as a main foodplant for the Toadflax Brocade moth, one of the highlights of last month’s walk (see here).

 

Due to the exceptional conditions of the summer, and delay in the start of autumn there was very little in the way of fungi in the wood. In fact we only found rather dull example of Wood Mushroom and Parasol, and not the spotty red and white Fly Agaric which we had hoped for,  but which can often be readily seen along the woodland trail, near Birch trees.

As always we were on the watch for bugs and beasties … a few nice examples included the smart red and black sawfly, an Arge species, although difficult to narrow down to an exact ‘Make and model’, there being many similar  versions of this little wasp.  Another sawfly, in the form of a gall caused by it, was found on the leaves of Willow: the gall even had the exit hole showing it had been vacated. Galls, along with fungi and fruits are likely to be the main focus of next month’s walk. A rather splendid Forest (also known as Red legged) Shield bug was discovered,  basking in the sun and enjoying his lunch, by means of his specially adapted piercing beak-like sucking mouthparts. This species is omnivorous,  also preying on caterpillars and other insects.

 On the marsh it was good to see a good number of the rare stripey-bottomed Sea Aster Mining-bee, which feeds almost exclusively on Sea Aster. It therefore emerges only in August-September when is food source is flowering. Its nesting colonies, on sandy ground above the reach of spring tides, cannot be too far away.

 

So what else did we see?  Um, let me think…..oh yes!, thanks to a tip off from our friend Glyn, we were very privileged to witness the majestic flight of a magnificent Osprey, circling at length above us. It was mobbed  by a couple of Buzzards, as one of our group exclaimed ‘3 birds of prey in my binoculars at once!’.   Although our walks being ‘non-birdy’ ( Richard Allen’s successful monthly bird walks are the place for a birding experience in Wivenhoe on a Saturday morning), we had to make an exception!  This bird was probably a migrant, on its way back to Africa. We can’t help thinking that this will be the lasting impression of our September outing. We managed just the odd snatched photo but no doubt Glyn’s magnificent efforts will be posted on the Wivenhoe Forum before too long!

And true to form, check out Glyn’s excellent photos of the bird here, on Page 31…

#WildWivenhoe Botany & Bug Walks: August – Whitehouse Beach

Those who read our reports regularly will know that they are usually upbeat affairs, rejoicing in the wonders of the natural world….well bear with me and there is a fair amount of that to come… but first I have something negative to comment on, namely LITTER ON WHITEHOUSE BEACH!  Why is it considered OK to leave several picnics’  worth of rubbish in a decomposing-in-the-sun black sack on the grassy sward of the beach?  Don’t worry, someone else will deal with it…..and in fact we did as we didn’t want all the contents to spill and allow yet more rubbish into the surrounding countryside… but couldn’t the revellers have taken it home with them?

Anyway, back to the lovely walk this morning.  The sun was slightly less overpowering than of late and we had a bit of a breeze and cloud cover.  The main focus was the many and varied salt marsh plants, and a walk along the seawall shows the different sections of saltmarsh according to how often the plants are covered each tide, ie on every tide, or only when there is a high spring tide, and every stage in between.  The different vegetation reflects how much the plants can stand being inundated by salt.

Two of the three UK species of samphire grow here in Wivenhoe, ‘Golden’ ( a member of the daisy family), and ‘Marsh’ (a spinach), whilst the third type ‘Rock’ is a carrot.  All show similar characteristics – succulent in that they store moisture in their leaves and stems, and good to eat with a wonderful salty taste (if you can be sure of the water quality where it grows of course).  The question comes to mind, If they do not share taxonomical links, then why are they all known as ‘Samphires’?  Well, an interesting theory is that this is a corruption of ‘Saint ‘ or ‘San Pierre’, ie St Peter, the fisherman.  And as we know samphires go remarkably well with fish.

Sea Purslane is an interesting plant, its cells are mini-desalination processors.  They take in salt water, convert it into fresh and eject the excess salt in little crystals, which coat the leaves causing them to look grey and shiny. Sea Lavender was in flower, the patches of purple clearly in contrast to the generally green saltmarsh flora.

Washed up along the shore line was a veritable blanket of dead vegetation, looking rather like grass cuttings.  This was the Gutweed, a rather (it must be said) unattractive little plant, looking rather like intestines, hence its name , but one which is considered a delicacy by our feathered friends who are soon to return to these parts from their summer vacations.

Other plants worth a mention, some illustrated below, were the pretty Lesser Sea Spurrey , Sea Wormwood,  and Shrubby and Annual Seablites.

A few butterflies and dragonflies fleetingly captured our interest, but we did stay and linger looking at a well-disguised moth on a seed head.  A Toadflax Brocade.  In  fact it was only when we looked at the photographs at home that we realised that there were actually two moths  – such was the remarkable camouflage.

Other interesting beasties included a mating pair of picture winged flies.  There are many types of such flies, each with distinctively and attractively patterned wings, and these guys go by the name of Campiglossa plantaginis, which breeds on Sea Aster, a common salt-marsh plant hereabouts.  Several male Ruddy Darter dragonflies sparkled along the sea wall, but although we searched we did not find any Wasp Spiders.

We hope this has whetted your appetite, as we are planning on re-running the walk next month, by which time more of the salt marsh plants will be in flower, and who knows we may be able to spot that elusive, but magnificent spider.

#WildWivenhoe Botany & Bug Walks: July – Lower Lodge

Phew!  What a scorcher!  Thank you to the participants of today’s Botany and Bug walk at Lower Lodge, and hope that you enjoyed seeing what is surviving this almost unprecedented dry spell: our last walk six weeks ago followed the last rain recorded in these parts, with no more than a hint of it in the next two weeks’ forecast….

Amazingly a lot is hanging on, and in fact doing rather well considering.  The uncut swathes are full of plants and alive with insects.  A vast contrast to the desert-like parched areas of mown grass.  A lesson to us all in what we can do to help the continued survival of our natural world: natural habitats have natural resistance against environmental stresses.

Insects were out in number and love was certainly in the air!  We rather voyeuristically watched the ‘goings on’ of  various pairs – the stunning Black-and- Yellow Longhorn-beetle; Common Red Soldier (aka Hogweed Bonking) Beetle; and the totally differently positioned Forest ( or Red-legged) Shield-bug.  Following on from this theme, a rather beautiful cache of ladybird eggs was seen glinting in the sun.

Other creatures of interest included several species of butterfly; two sorts of skipper; a long-horned moth;  plus both 5- and 6-spotted Burnet Moths. The egg cases of these beautiful day-fliers are curious affairs, and we were lucky enough to see one clinging to a grass stem.    Caterpillar fans were delighted to see the yellow-and-black Cinnabar Moth larvae out in force, chomping their way through poisonous Ragwort.  In addition a selection of ladybirds, spiders, bees and grasshoppers  made for a varied couple of hours.

We were aware of the presence of microscopically small creatures too – in the form of galls (abnormal growths caused by something living in or on the host plant and causing its cells to enlarge and provide shelter and food for the gall-causer). Oaks are particularly interesting where galls are concerned – in fact in the UK various kinds of Oak support over 50 different kinds of them, on leaves, buds, stems, acorns and sometimes on the trunk. We saw a few of these today – the artichoke;  ram’s-horn; marble; knopper and spangle-galls.  Others were no doubt there had we had longer to search.  And it wasn’t just the Oak, Willows too supported a variety of gall-causing insects and mites.

On the plant front, a favourite was Wild Carrot – an umbellifer loved by many kinds of insect.  The variety we encountered has a tiny red flower in the middle of each umbel which acts as an attractant to other insects to ‘Come on Down and check out my pollen’.  The Jack-Go-to-Bed-At-Noon flower had indeed gone to bed very early, and most were now in rather beautiful seed-head form. Bird’s Foot Trefoil and Scabious provided some colour and we were all interested to listen  to the popping seed heads of the Tufted Vetch.  These were exploding in the heat and dryness, popping their seeds into the air to propagate for next year. Who said plants are silent?

 

King George V Playing Field : the new wildflower meadows #wildwivenhoe

After several years of persuasion, cajoling and  guilt-tripping, Wivenhoe finally has its new hay meadows. I may return to this in future posts, how and why it took so long, and why the need for serious positive action from Wivenhoe Town Council became so imperative: the reasons are not altogether positive. But for now, let us celebrate what looks like becoming a great success…

This afternoon, we took a wander along to the KGV wildflower meadows, and were delighted to see how it is coming along after the first couple of months of no mowing. The patchwork of grasses is developing well, with perhaps 10 or 12 species in flower, each with a different variation of the green theme.

The Buttercups and Dandelions, so noticeable a month ago, have now largely gone over. But their role in nectar and pollen supply for insects (and in the colour palette for us) has been taken over by other species, including some good patches of Bird’s-foot-trefoil and Lesser Stitchwort, neither of which we had noticed in the close-mown sward previously. Equally exciting, albeit not yet in flower, was a clump of Lady’s Bedstraw, always a sign of high-quality grassland, and not at all common around Wivenhoe.

In just ten minutes, we recorded both Small Heath and Common Blue butterflies; Silver Y and various grass moths; and a variety of other insects, including Thick-thighed Beetle. All in all, a very promising start….

#WildWivenhoe Botany & Bug Walks: June – 41 Acres

’41 Acres’, ‘The bit behind the Allotments’, ‘the southern end of Wivenhoe Heath’, whatever you like to call it, was certainly an interesting venue for our June’s Botany and Bug walk. Thank you to everyone who joined us, especially the hay-fever sufferers who found it challenging but nevertheless enjoyable…

The main reason for hay-fever stress was pollen from the many and varied grasses which inhabit this area – land formerly gravel pits but which is now filled in and in recent times been allowed to do its own thing. On an early summer morning, slightly damp and very humid it was certainly lush and fertile, but slightly worryingly, unless this land is managed, it is in danger of becoming too overgrown and losing its wildlife interest.

So, what did we see? The aforementioned grasses, with their wonderful English names – the peppery-tasting False Oat-grass, Cock’s-foot and Yorkshire Fog – were all looking splendid.

 

Pretty pea-flowers of various types were easily spotted, including tares, vetches, medicks and the beautiful Grass Vetchling.

 

 

 

 

 

 

A botanical highlight had to be the Southern Marsh-orchids, maybe thirty of their purple spikes visible among the dense undergrowth. This is one of the species that will eventually be pushed out if nothing is done to control its neighbours, as has probably already happened to some of the other orchids found here until three years ago.

 

 

 

 

Insects were out in force. The brightly-coloured Cardinal beetle was easy to see, but other more camouflaged beasties were equally interesting: the rather peculiar European Cinchbug family clinging to a grass leaf, the bagworm moth encased in its suit of dead grass stems, and the unidentifiable but undeniably cute saw-fly caterpillar.

A couple of species of ladybird were noticed – a tiny vegetarian 24-spot, one of the smaller types, and in contrast the much larger Harlequin, a voracious eater of aphids, but unfortunately also other ladybirds. Watch out Mr 24 spot!

Thick-thighed Beetles were looking polished and sparkling in the sunshine, but the piece de resistance had to be the fabulous Fox Moth, spotted  by Glyn.

Our next walk will be on Sunday 15th July – a different date to that advertised, (we wouldn’t want to compete with The Tendring Show), at Lower Lodge.  Meeting place will be the Outdoor Gym, easily accessible from Dixon Way, or the railway crossing from the trail, or the Rosabelle woodland car park. If you would like to book a place, please contact Jude (jmgibson1959@btinternet.com 07503240387).  Looking forward to seeing some of you there.

Wildlife Galore in Cockaynes Reserve

On a sunny, not too hot, day like today, it is a great time to go out and wander around Cockaynes Reserve with a camera. Even when there is quite a breeze, it is always possible to find sheltered nooks, where insects often congregate and can be snapped without wind-blur.

No time today to provide a full written commentary, so I will let the flowers and critters speak for themselves…


Mouse-eared Hawkweed

Ground-ivy – a magnet for bee-flies and other insects

Wild Strawberry

Changing Forget-me-not – its flowers start out yellow in bud, then fade to cream before ending up blue

Sweetly-scented Holly flowers – the males (left), with functional stamens, and females (right) with non-pollen-producing stamens, perhaps the Holly-equivalent of the male nipple?


Marsh Horsetail fertile, spore-bearing ‘cone’

Bonfire Moss, as its name suggests often found on recently-burnt ground

Anther Smut on Red Campion; the smut fungus infects and infests the plant, takes over the plant’s pollen-dispersal structures and appropriates them to disperse its own sooty spores.

On now to the insects, starting with a selection of True Bugs:

Gorse-Shield-bug

A plant-bug Harpocera thoracica: male (L) and the very different looking female (R)

The nymph of another plant-bug Miris striata, looking and acting for all purposes like an ant

and not actually a bug, but the shed skin of an early-stage nymph of the Forest Bug

Our first soldier-beetle of the season, Cantharis nigricans

A couple of hoverflies, both from difficult groups – (L) Pipiza  and (R) Syrphus

The Stripe-legged Robberfly Dioctria baumhaueri

A dance-fly Empis tessellate

The wasp-like Nomad Bee Nomada flava

Small Gorse Mining-bee Andrena ovatula



A buttercup-full of tiny moths Micropterix calthella – this family is the only group of moths and butterflies which have jaws, to feed on pollen

Azure Damselfly male

Mating pair of Large Red Damselflies

A pristine Four-spotted Chaser dragonfly

Last of all we reach the spiders (arachnophobe warning!)

A stretch-spider Tetragnatha species

Larinioides cornutus

and finally, a Metellina species.

Unravelling the mysteries of our Bluebells

As the Bluebell extravaganza in Wivenhoe Wood starts to fade, I have been reflecting on the wonder that is our Bluebell. An almost universally-loved feature of our spring countryside, but one that is if anything underappreciated. It is a feature of the here and now: here, as it is restricted to the Atlantic fringes of northern Europe; now, as in the past when we still had Wild Boar, their rootlings would have prevented the massed displays we now take for granted.


Native Bluebell


Spanish Bluebell

But as is well known, our native Bluebells are under threat, particularly from the Spanish Bluebell, not by displacement but by dilution – insidious genetic pollution. The Spanish species, grown in gardens here for a couple of centuries at least, is less vibrantly coloured, more feebly scented, with splayed rather than recurved petals, altogether a less droopingly delicate plant, with flowers all around its stems, rather than one-sided. Unfortunately, as plants so often do, the two species readily hybridise. And the hybrids breed freely with other hybrids or either parental species. The result? A continuous suite of intermediates between the two parental species. 

Sometimes those hybrid intermediates are quite clearly so…


Hybrid Bluebell

…but sometimes less clearly, in which case you need to look more closely at the flower structure, as I have been doing this week. 

To be a true native Bluebell, the ‘petals’ (actually technically termed tepals, as the six segments representing the sepals and the petals are the same shape and colour as each other) should be strongly recurved; the pollen-producing anthers should be cream in colour; and the stamen adjacent to each outer tepal should be fused to the surface of the tepal for at least 75% of its length. Incidentally, all this came as a surprise to me as a lifelong botanist: I had simply never delved into bluebell flower structure before. Never knew about the stamens fused to the tepals, nor the fact that the stamens associated with the inner whorl of tepals are shorter, attached only at the bottom of the tepal, and the inner anthers burst open to release pollen later than the outer anthers. Such a revelation!


Above: close-ups of a native Bluebell flower

In contrast, ‘good’ Spanish Bluebells should have splayed tepals; blue anthers; and the stamen adjacent to each outer tepal should be fused to the surface of the tepal for less than 75% of its length.


Above: Close-ups of Spanish Bluebell flower

And then there are the hybrids, intermediate in detailed flower features as well as gross morphology.


Above: close-ups of Hybrid Bluebell

Trouble is that whereas plants may look either of the true parental species, detailed examination of anther colour and stamen insertion etc often reveals a degree of hybrid ancestry, anomalous features which indicate genetic pollution through the pollen dispersal activities of bees. The closer one looks, the less clear-cut the story becomes!