Luzula acuminata |
Luzula comosa |
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hairy wood rush |
hairy wood rush, Pacific wood-rush |
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Rhizomes | similar to stolons. |
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Culms | loosely cespitose, 10–40 cm × width3–5 mm. |
cespitose, 10–40 cm. |
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Stolons | to 6 cm, scale leaves present. |
absent. |
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Leaves | sheaths reddish, throat pilose; blade sparsely pubescent; basal leaves 32 cm × 12 mm; cauline leaves 2–4, 2–4 cm × 2–5 mm. |
sheath throats with long, soft, wavy hairs; basal leaves 5–15 cm × 3–7 mm, margins with long, soft, wavy hairs, apex callous. |
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Inflorescences | cymose, not rarely branching or often branching to 6 cm; proximal inflorescence bract 1/2–2/3 inflorescence length; bracts straw-colored, apex truncate, lacerate, glabrous or pubescent; bracteoles lance-ovate, 1/3–1/2 tepal length; pedicels single or paired, erect to spreading, 1–4 cm. |
umbellate or sessile glomerules, 5–15 × 5–7 mm; glomerules 1–6, spheric to nearly cylindric; branches straight, divergent by as much as 90°, 0.5–5 cm; proximal inflorescence bract conspicuous, shorter than to much longer than inflorescence; bracts clear, margins nearly entire to lacerate; bracteoles clear, margins ciliate, especially in distal half. |
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Flowers | tepals pale to dark brown, 3–4.5 mm, margins entire, clear; anthers 2 times filament length; stigmas ± equaling style length. |
tepals dark brown to pale with clear margins, 2–5 mm; outer whorl often longer than inner whorl; anthers much exceeding to shorter than filaments. |
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Capsules | green to straw-colored, exceeding tepals; beak a mucro; valves widely spreading upon splitting. |
greenish to dark brown, spheric, equal to or much shorter than tepals. |
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Seeds | reddish to brown, 1–1.5 mm; caruncle curved, ± equaling length of seed body. |
red-brown to brown, cylindric, 1–1.5 mm; caruncle 0.3–0.8 mm. |
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2n | = 48. |
= 12, 24. |
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Luzula acuminata |
Luzula comosa |
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Phenology | Flowering and fruiting spring–summer. | |||||
Habitat | Meadows, open woods, coniferous forest | |||||
Elevation | 50–3200 m (200–10500 ft) | |||||
Distribution |
AK; CA; CO; ID; MT; NE; NM; OR; SD; UT; WA; WY; AB; BC
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sheath throats and margins of the basal leaves of Luzula comosa have long, soft, wavy hairs. The highly variable nature of this species is indicated by the number of names applied to it., including: Luzula campestris var. comosa (E. Meyer) Fernald & Wiegand; L. campestris var. macrantha (S. Watson) Fernald & Wiegand; L. campestris var. columbiana St. John; L. comosa var. congesta (Thuillier) S. Watson; L. comosa var. laxa Buchenau; L. comosa var. macrantha S. Watson; L. comosa var. subsessilis S. Watson; L. intermedia (Thuillier) A. Nelson; L. multiflora ssp. comosa (E. Meyer) Hultén; L. multiflora subsp. congesta (Thuillier) Hylander; L. subsessilis Buchenau. Synonymy?? (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 22, p. 256. | FNA vol. 22. | ||||
Parent taxa | Juncaceae > Luzula > subg. Pterodes | Juncaceae > Luzula > subg. Luzula | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | L. campestris var. comosa, L. campestris var. columbiana, L. campestris var. macrantha, L. comosa var. congesta, L. comosa var. laxa, L. comosa var. macrantha, L. comosa var. subsessilis, L. intermedia, L. multiflora subsp. comosa, L. multiflora subsp. congesta, L. subsessilis | |||||
Name authority | Rafinesque: Autikon Botanikon 3: 193. (1840) | E. Meyer: Syn. Luzul. 21. (1823) | ||||
Web links |
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