Watch Out for the Bluebells!

(Posted on behalf of Doug Edworthy)

The Bluebells are beginning to push their leaves above ground in preparation for the magnificent display they put on for us each year. But after seeing the recent damage to plants in Dallington Forest from off-road motor bikes I felt I should pen a short article about these beautiful flowers of ancient woodland.

photo of bluebells in Dallington SSSI
Bluebells in Dallington SSSI. Credit: Doug Edworthy

 

 

 

 

 

 

Bluebells face two existential threats: competition with the more vigorous Spanish bluebell which has been escaping from gardens and hybridizing with our native species for 300 years, and the effects of change or disturbance (which is why they are an indicator of ancient, undisturbed woodland).

Hybridisation

There is a real danger of losing the genetic integrity of one of our best-loved native wildflowers, not to mention the spectacular colour and scent, because our native bluebell (Hyacinthoides non-scripta) readily cross-breeds with both its Spanish cousin Hyacinthoides hispanica, often planted in gardens, and with the resulting fertile hybrid Hyacinthoides hispanica x non-scripta. But, do you know the difference between the species?

Photograph of native bluebell
Image Credit: Doug Edworthy

Native bluebell Hyacinthoides non-scripta

This bulbous perennial, native to north-western Europe, seems to prefer slightly acidic soils and partial shade. Early in the growing season, they can be a dominant species in coppiced woods on light soils, but they are also found on hedge-banks and sea-cliffs.

The native bluebell’s deep violet-blue flowers have a strong sweet scent, the pollen is yellow and the flower stems droop or nod distinctively to one side.

White-flowered native bluebells are exceedingly rare. If you are tempted to take one home, please note: it’s against the law to intentionally pick, uproot or destroy native bluebells.

Photo of Spanish bluebell
Image Credit: Wikipedia Commons

Spanish bluebell Hyacinthoides hispanica

This species, native to Portugal and western Spain, was first introduced in British gardens as an ornamental plant in the 1680s. It was favoured over the native because it can grow on almost any soil and has bolder blooms.  It is a larger, more upright plant than the native bluebell. Its flowers range in colour from pale to mid blue, or white or pink, and has characteristically deep blue pollen but no scent. The Spanish bluebell was first recorded in the wild in the UK in 1909. This species is often confused with the hybrid and has therefore probably been over-recorded by botanists in the past.

Hybrid bluebell Hyacinthoides hispania x non-scripta

The Spanish bluebell readily cross-breeds with the native bluebell to form the fully fertile hybrid. The hybrid was first recorded in the wild in the UK in 1963 and is also extremely common in gardens. Hybrid plants can demonstrate characteristics of both the native and Spanish bluebells.

What can we do about the non-native bluebells?  Well, plant only native bluebells in your garden and be on the lookout for Spanish or Hybrid bluebells in the wild. If you find some, let me know and/or Sussex Wildlife Trust. Please don’t uproot them unless they are on your land, and then only if you are absolutely sure they aren’t native.

Disturbance

The other threat comes directly from the impact of us walking where bluebells grow and, unintentionally or not, damaging them. It’s against the law to intentionally pick, uproot or destroy native bluebells.

During their active phase, which runs from February through until the leaves have died back in Summer, they are extremely susceptible to damage from our boots. Treading on the soft, succulent leaves damages them so they can no longer photosynthesis and they die back. This reduces their ability to put food back into their bulbs, reducing the plants’ ability to produce flowers and seeds.

Also, soil compaction damages the bulbs so they won’t appear next year. You can see the effect of this along many woodland paths where not keeping to paths during the bluebell season has widened the paths as the bluebells recede.

Bluebell colonies take a long time to establish – around 5-7 years from seed to flower, and can take years to recover after footfall damage so please keep to paths and resist the temptation to step into the blue for a selfie or a photo opportunity. Your feet could be doing more damage than you realise.

Enjoy the sight and scent of these wonderful flowers and take care where you tread so they will still be carpeting our woodlands for future generations to marvel at.

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