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hairy wood rush

fork wood rush

Rhizomes

similar to stolons.

thick.

Culms

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

densely cespitose, reddish, 6–30 cm × 2 mm.

Stolons

to 6 cm, scale leaves present.

Leaves

sheaths reddish, throat pilose;

blade sparsely pubescent;

basal leaves 32 cm × 12 mm;

cauline leaves 2–4, 2–4 cm × 2–5 mm.

basal leaves numerous, blade to 20 cm × 4–6 mm, sometimes longer than stem, apex long-pointed to 12 mm, mostly glabrous;

cauline leaves 2–3.

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.

5–15 cm, width 1/2 to equaling length;

branches widely spreading to 90°, stiff, not drooping;

proximal bract inconspicuous, less than 2 cm;

bracts and bracteoles clear, margins slightly lacerate, often with a few cilia.

Flowers

tepals pale to dark brown, 3–4.5 mm, margins entire, clear;

anthers 2 times filament length;

stigmas ± equaling style length.

solitary;

tepals pale brown with reddish tint, 1.8–2.4 mm, apex reflexed, long-acuminate;

outer whorl slightly longer than inner whorl;

anthers ± equaling filaments;

stigmas 3 times style length.

Capsules

green to straw-colored, exceeding tepals;

beak a mucro;

valves widely spreading upon splitting.

deep reddish brown, shorter to slightly longer than tepals.

Seeds

reddish to brown, 1–1.5 mm;

caruncle curved, ± equaling length of seed body.

light brown, 1.2 mm.

2n

= 48.

Luzula acuminata

Luzula divaricata

Phenology Flowering and fruiting summer.
Habitat Subalpine forest to alpine granitic slopes
Elevation 2100–3700 m (6900–12100 ft)
Distribution
from USDA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; ID; NV; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

The culms of Luzula divaricata are reddish colored.

(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. Anthelaea
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. comosa, L. confusa, 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
Name authority Rafinesque: Autikon Botanikon 3: 193. (1840) S. Watson: Proc. Amer. Acad. Arts 14:302. (1879)
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