Eriophorum angustifolium

Plants colonial from long-creeping rhizomes. Culms to 100 cm × (0.8–)1–1.2 mm distally. Leaves: blades flat, tip trigonous, channeled in cross section, to 40 cm × 1.5–6(–8) mm; distal leaf blade much longer than sheath. Inflorescences: blade-bearing involucral bracts 1–3, proximally blade, often sheath black, leaflike, longest 1–12 cm. Spikelets (1–)2–10, in subumbels, patent or pendent, ovoid, 10–20 mm in flower, 20–50 mm in fruit; peduncles 5–60 mm, smooth or scabrous; scales lanceolate or ovate, 5–10 mm, with prominent midrib fading proximal to tip, apex ± acute; proximal scales without lateral ribs. Flowers: perianth bristles 10 or more, white or pale yellow brown, 15–30 mm, smooth; anthers 2–5 mm. Achenes black, oblanceoloid, 2–5 mm.

Distribution

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North America, n Eurasia.

Discussion

eriophorum polystachion linnaeus is a rejected name

Subspecies 2 (2 in the flora).

Selected References

None.

Lower Taxa

Eriophorum angustifolium subsp. angustifolium, Eriophorum angustifolium subsp. triste

Key

1	Peduncles glabrous or scabrous on angles; culms 20–100 cm.	Eriophorum angustifolium subsp. angustifolium
1	Peduncles usually scabrous all around; culms not more than 30 cm.	Eriophorum angustifolium subsp. triste