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fork wood rush

Piper's wood-rush, smooth woodrush

Rhizomes

thick.

horizontal, short.

Culms

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

densely cespitose, 10–30(–35) cm.

Leaves

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.

basal blade green, 5–10 cm × 2–4 mm, firm, essentially glabrous;

cauline leaves 2–3, 3–7 cm × 3–5 mm.

Inflorescences

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.

branches spreading less than 90°, lax;

proximal inflorescence bract leaflike, 0.8–1.5 cm;

bracts and bracteoles brown, clear at apex, margins strongly ciliate.

Flowers

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.

single or in clusters of 2–3;

tepals dark brown, 1–2.5 mm, ± equal, apex acute, not reflexed;

anthers ± equaling filament length;

stigmas 5 times style length.

Capsules

deep reddish brown, shorter to slightly longer than tepals.

dark brown, ellipsoid, shorter than 2.5 mm, longer than tepals;

beak absent.

Seeds

light brown, 1.2 mm.

light yellow-brown, lanceolate, narrowed at ends, 1.2 mm.

2n

= 24.

Luzula divaricata

Luzula piperi

Phenology Flowering and fruiting summer. Flowering and fruiting summer.
Habitat Subalpine forest to alpine granitic slopes Snowbeds and mesic heaths in subalpine and oceanic zones
Elevation 2100–3700 m (6900–12100 ft) 400–2400 m (1300–7900 ft)
Distribution
from FNA
CA; ID; NV; OR; WA
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from FNA
AK; ID; MT; OR; WA; AB; BC; YT; e Asia
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Discussion

The culms of Luzula divaricata are reddish colored.

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

Source FNA vol. 22. FNA vol. 22.
Parent taxa Juncaceae > Luzula > subg. Anthelaea Juncaceae > Luzula > subg. Anthelaea
Sibling taxa
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
L. acuminata, 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. rufescens, L. spicata, L. subcapitata, L. subcongesta, L. wahlenbergii
Synonyms Juncoides piperi, L. wahlenbergii subsp. piperi
Name authority S. Watson: Proc. Amer. Acad. Arts 14:302. (1879) (Coville) M. E. Jones: Bull. Biol. Ser. Bull. State Univ. Montana 15: 22. (1910)
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