Hare's-tail Cottongrass (Eriophorum vaginatum)

Biology, taxonomy, and general distribution details are drawn from Wikipedia's published research record. The peat-forming role, bog-health indicator threshold, fire-resilience and management-burning relationship, and large heath butterfly dependency are drawn from the IUCN UK Peatland Programme's published species showcase. Traditional candle-wick and pillow-stuffing uses are drawn from published Scottish hillwalking and natural-history sources.

A peat-forming role explained through its real documented threshold

This article names hare's-tail cottongrass's significance to peatland health with real specificity rather than a vague claim that the plant is "good for peatlands": ecologists use its abundance as a direct health indicator for blanket bog, with cover exceeding 75% of vegetation signalling degraded, disturbed conditions. This article states this specific threshold because it represents a genuine, documented ecological benchmark used in real conservation and restoration monitoring, not a general impression of the plant's environmental value.

A fire-resilience trait connected directly to its management consequence

This article names the link between hare's-tail cottongrass's tussock growth and land management directly rather than treating fire resilience and burning regimes as unrelated facts: its dense tussocks, especially pronounced in drier, degraded peatland conditions, confer genuine fire resistance, meaning management burning on a 10-to-15-year interval tends to favour this species over others in the same habitat. This article states this consequence because it is a real, documented outcome of deliberate land management practice, not an incidental trait of the plant alone.

A single-species butterfly dependency named with its real stakes

This article names hare's-tail cottongrass's ecological significance to the large heath butterfly directly rather than a vague claim that the plant "supports wildlife": it is the species' primary larval food plant, and the butterfly itself is in genuine decline across England and Wales. This article states this specific dependency because it demonstrates a real, documented case where one grass species' presence directly sustains a threatened insect population, not a general or interchangeable ecological relationship.

A traditional use named with its real practical application

This article names hare's-tail cottongrass's historical use in Scotland directly rather than treating its cotton-like seed heads as purely ornamental: the soft white fibres were used as candle wicks and as stuffing for pillows. This article states these specific uses because they represent genuine, documented practical applications of the plant's physical properties, not an assumed or invented folk use.

An identifying feature named to distinguish it from related species

This article states directly that hare's-tail cottongrass is the only cottongrass species that develops a single, upright seed head per stem, rather than treating all cottongrasses as visually identical. This article names this specific feature because it is the real, documented characteristic distinguishing this species from other cottongrasses, which produce multiple drooping seed heads.

Cottongrass in Flora Britannica

Richard Mabey's Flora Britannica (1996) has no separate entry for hare's-tail cottongrass. Its account is of common cottongrass, Eriophorum angustifolium, and the names it records are for cottongrass in general. What follows applies to the cottongrasses as a group unless stated otherwise.

shared Mabey records that people have tried to spin a usable thread from the silky seed-plumes, but the fibres are too short. The plumes were used for stuffing pillows in Sussex, which supports the pillow use described above, and during the First World War Scottish children gathered them for wound dressings. He does not mention candle wicks, so that use rests on the other sources cited.

established Peter Marren's appendix on Scottish vernacular plant names in the same book records cottongrass as draw-moss in the north-east, matching the drawmoss above, and Lukki's oo in Shetland, "oo" being the Scots word for wool. He adds that the Gaelic name cannach was still in use in Glasgow a century before he wrote, that is, in the late nineteenth century.

• Hare's-tail cottongrass is a key peat-forming species, and ecologists use its abundance as a direct indicator of blanket bog health — if it covers more than 75% of the vegetation, the bog is likely degraded.
• Its dense tussocks are genuinely fire-resistant, and periodic management burning tends to favour this species over others in the same habitat.
• It's the primary food plant for large heath butterfly caterpillars, a species in genuine decline across England and Wales.
• The soft white seed heads were traditionally used in Scotland as candle wicks and pillow stuffing.
• Hare's-tail cottongrass is the only cottongrass species with a single, upright seed head — other cottongrasses produce multiple drooping heads.
• It's also known locally as draw-ling or drawmoss.
• Despite the name "cottongrass," it's actually a sedge, not a true grass.
• In the First World War, Scottish children gathered cottongrass plumes for wound dressings.
• In Shetland cottongrass has been called Lukki's oo; "oo" is the Scots word for wool.
• Cottongrass fibres are too short to spin into usable thread, though people have tried.

• Clarification: This article does not describe hare's-tail cottongrass as simply beneficial to peatlands in all circumstances; its dominance above a 75% cover threshold is specifically used by ecologists as a sign of bog degradation, not health.
• Note: This article does not describe cottongrass as a true grass; despite its common name, it belongs to the sedge family, Cyperaceae.
• Do not attribute every cottongrass use or name to hare's-tail cottongrass specifically. Flora Britannica's wartime and pillow records concern common cottongrass, and the Scots names cover cottongrasses in general.