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Wahlenberg's wood rush

small-flower wood-rush

Rhizomes

short.

Culms

cespitose, 15–30(–35) cm.

loosely cespitose, (20–)30–100 cm, base often reddish, often distinctly so at proximal internodes.

Stolons

to 5 cm or absent.

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.

sheath throat with long, soft hairs;

basal leaf blade 12–17 cm × 5–10 mm, mostly glabrous;

cauline leaves 3–6, dull yellowish or bluish to gray-green to shiny, bright green, 7–9 cm × 3–5 mm, apex acute to acuminate.

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.

anthelate, few-to-many flowered, 4–20 × 4–12 cm;

major branches spreading less than 90°, lax, often arching;

proximal inflorescence bract inconspicuous to leaflike, to 5(–8) cm;

bract margins entire to lacerate;

bracteoles clear or brown, margins entire to lacerate.

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.

(1–)2–4, crowded or open;

tepals pale brown to brown, broadly lanceolate, 1.8–2.5 mm, apex acute, not reflexed;

anthers equaling to shorter than filaments;

stigmas well exceeding style.

Capsules

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

beak absent.

straw-colored to dark brown to blackish, spheric, less than 2.5 mm, equal to generally longer than tepals;

beak absent.

Seeds

dark reddish brown, cylindric, 1.2–1.6 mm;

caruncle essentially absent.

brown to brownish red or purple, ellipsoid, 1.1–1.5 mm.

2n

= 24.

= 24.

Luzula wahlenbergii

Luzula parviflora

Phenology Flowering and fruiting late summer. Flowering and fruiting spring–late summer.
Habitat Wet mossy arctic and alpine tundra, lake shores, alluvial rivers, shores of alpine creeks, gneissic seashores Meadows in temperate to subalpine boreal forests, wet grasslands and tundra, willow copses, herb slopes
Elevation 40–600 m (100–2000 ft) 0–3300 m. (0–10800 ft.)
Distribution
from FNA
AK; BC; MB; NT; NU; QC; YT; Greenland; Eurasia
[BONAP county map]
from FNA
AK; AZ; CA; CO; ID; MA; ME; MI; MN; MT; NH; NM; NV; NY; OR; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; QC; SK; YT; SPM; Greenland; Eurasia
[WildflowerSearch map]
[BONAP county map]
Discussion

The base of the culm of Luzula parviflora is often reddish and often distinctly so at the proximal internodes.

(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. 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. 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. piperi, L. rufescens, L. spicata, L. subcapitata, L. subcongesta, L. wahlenbergii
Synonyms Juncus parviflorus
Name authority Ruprecht: Fl. Samojed. Cisural. 58. (1845) (Ehrhart) Desvaux: J. Bot. (Desvaux) 1: 144. (1808)
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