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hairy wood rush

hairy wood rush, Pacific wood-rush

Rhizomes

similar to stolons.

Culms

loosely cespitose, 10–40 cm × width3–5 mm.

cespitose, 10–40 cm.

Stolons

to 6 cm, scale leaves present.

absent.

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.

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.

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.

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.

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.

2n

= 48.

= 12, 24.

Luzula acuminata

Luzula comosa

Phenology Flowering and fruiting spring–summer.
Habitat Meadows, open woods, coniferous forest
Elevation 50–3200 m (200–10500 ft)
Distribution
from USDA
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; CA; CO; ID; MT; NE; NM; OR; SD; UT; WA; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
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.)

Key
1. Inflorescences simple, with occasional branch from near base of flower
var. acuminata
1. Inflorescences usually branching, with pedicels commonly paired
Luzula acuminata var. carolinae
Source FNA vol. 22, p. 256. FNA vol. 22.
Parent taxa Juncaceae > Luzula > subg. Pterodes Juncaceae > Luzula > subg. Luzula
Sibling taxa
L. arctica, L. arcuata, L. bulbosa, L. campestris, L. comosa, L. confusa, L. divaricata, L. echinata, L. groenlandica, L. hitchcockii, L. kjellmaniana, L. luzuloides, L. multiflora, L. orestera, L. pallidula, L. parviflora, L. piperi, L. rufescens, L. spicata, L. subcapitata, L. subcongesta, L. wahlenbergii
L. acuminata, L. arctica, L. arcuata, L. bulbosa, L. campestris, L. confusa, L. divaricata, L. echinata, L. groenlandica, L. hitchcockii, L. kjellmaniana, L. luzuloides, L. multiflora, L. orestera, L. pallidula, L. parviflora, L. piperi, L. rufescens, L. spicata, L. subcapitata, L. subcongesta, L. wahlenbergii
Subordinate taxa
L. acuminata var. acuminata
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)
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