Eriophorum chamissonis |
Calliscirpus criniger(synonym of Eriophorum crinigerum) |
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russet cottongrass |
fringed cottongrass |
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Habit | Plants cespitose. | |
Culms | somewhat trigonous; (20)30–70(80) cm; stout; to 1.5(4) mm thick basally. |
(10)20–100 cm × 0.6–2 mm. |
Leaves | blades filiform, trigonous-channeled; (2)3–10 cm × 1–2 mm; distal 1–2 leaf sheaths bladeless. |
blades flat; to 45 cm × 1–6 mm. |
Inflorescences | involucral bracts absent. |
involucral bracts 2–5; sheathless; scale-like, 0.4–0.8(2.2) cm; apex sometimes mucronate. |
Spikes | 1; floral scales blackish to purplish brown; proximal 1–7 scales empty, obovate or trigonous-obovate, 4–20 mm; margins white or paler; as wide as dark portion; apex blunt; distal scales obovate to ovate-lanceolate; margins hyaline, 1 mm wide or wider. |
usually in dense head, subsessile, 3–10 mm long; scales brown, with pale brown or green markings, often red-spotted, 2.5–4 mm. |
Flowers | perianth bristles 20–40 mm, red-brown to white; anthers (0.6)1.5–3 mm. |
perianth bristles usually 6, 3–9 mm, pale brown, usually antrorsely barbed; anthers 1.2–2 mm. |
Achenes | oblong-obovoid, 2–2.7 mm; as wide as long. |
1.5–3 mm. |
2n | =58. |
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Eriophorum chamissonis |
Calliscirpus criniger |
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Distribution | ||
Discussion | Coastal bogs and marshes. 0–50 m. Est. ID, WA; north to AK, east to WI, southeast to CO; Eurasia. Native. Eriophorum chamissonis is a lovely plant with large, shiny, dense heads of long, red-brown or bronze hairs. |
Bogs and seepy slopes, usually on serpentine. 300–1900 m. CR, Sisk. CA. Native. The phylogenetic relationships involving C. criniger have been unclear (Ball and Wujek 2002). The species has one close relative in the Sierra Nevada of California and another in northeastern Asia. All three have been placed in both Scirpus and Eriophorum but do not fit well in either genus. A recent study recommended placing these species in their own genus (Gilmour et al. 2013). |
Source | Flora of Oregon, volume 1, page 244 Barbara Wilson, Richard Brainerd, Nick Otting |
Flora of Oregon, volume 1, page 171 Barbara Wilson |
Sibling taxa | ||
Synonyms | Eriophorum crinigerum, Scirpus criniger | |
Web links |