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Wahlenberg's wood rush

bitterroot, curved wood-rush

Rhizomes

short.

Culms

cespitose, 15–30(–35) cm.

Leaves

sheath throat acutely angled, pilose;

basal leaf blade 5–10 cm × 3–8 mm, apex short acuminate, mostly glabrous;

cauline leaves (1–)2–4, 3–5 cm × 2–4 mm.

Inflorescences

anthelate, few flowered;

main branches generally 2–4, spreading less than 90°, lax, usually arching;

proximal inflorescence bract 1 cm or less;

bracts and bracteoles brown;

margins with long curly cilia.

Flowers

solitary on short pedicels;

tepals dark purplish brown (margins finely lacerate toward apex), 2–2.5 mm, margins finely lacerate toward apex, apex acute, not reflexed;

anthers ± equaling filament length;

stigmas 2 times style length.

Capsules

dark brown, less than 2.5 mm, slightly longer than tepals;

beak absent.

Seeds

dark reddish brown, cylindric, 1.2–1.6 mm;

caruncle essentially absent.

2n

= 24.

Luzula wahlenbergii

Luzula arcuata

Phenology Flowering and fruiting late summer.
Habitat Wet mossy arctic and alpine tundra, lake shores, alluvial rivers, shores of alpine creeks, gneissic seashores
Elevation 40–600 m (100–2000 ft)
Distribution
from FNA
AK; BC; MB; NT; NU; QC; YT; Greenland; Eurasia
[BONAP county map]
from FNA
AK; MT; WA; AB; BC; NT; YT; Eurasia
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies. 2 (1 in the flora).

(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. Luzula
Sibling taxa
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. piperi, L. rufescens, L. spicata, L. subcapitata, L. subcongesta
L. acuminata, L. arctica, 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
Subordinate taxa
L. arcuata subsp. unalaschkensis
Synonyms Juncus arcuatus
Name authority Ruprecht: Fl. Samojed. Cisural. 58. (1845) (Wahlenberg) Swartz: Summa Veg. Scand. 13. (1814)
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