Country diary: A single act of care 40 years ago, and we have this splendid, rare colony | Sarah Lambert
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- Sarah Lambert makes an annual pilgrimage to a colony of crested cow-wheat (Melampyrum cristatum), a rarity that grows only in a small part of eastern England.
- Crested cow-wheat is hemiparasitic: its leaves make food while its roots tap neighbouring plants for water and minerals, limiting how far it can travel.
- Ants drag the plant's oil- and protein-rich seeds underground into fine nest soil, where the seeds germinate — the mechanism that anchors existing colonies in place.
- Lambert first met the species in the 1980s at a precarious colony beneath a shady oak on a verge in Ufford, which then faded when rabbit disturbance declined and the grass grew long.
- A reserve warden gathered seed from the doomed Ufford colony before it vanished and sowed it at a site with plentiful ants and winter cattle grazing to keep the sward open, founding the thriving population Lambert visits today.
Why it matters: A single seed-gathering intervention roughly 40 years ago preserved a hemiparasitic wildflower that cannot readily colonise new ground on its own, so the entire current colony traces directly to one warden's foresight — a concrete case where a small, timely conservation action locked in decades of biodiversity that would otherwise have been lost.
