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arctic wood rush

tundra woodrush

Culms

densely cespitose, 5-20 cm.

loosely cespitose, light green, 15–25 cm.

Leaves

sheaths brown to straw-colored;

basal leaves to 10 cm × 4 mm;

cauline leaves usually 2, reduced.

sheaths dull brown-gray at base, becoming green distally, throats hairless;

basal leaves flat toward base, channeled toward apex, 4–16 cm × 3–8 mm, apex abruptly pointed, callous, glabrous.

Inflorescences

glomerules 1-3, sessile;

proximal inflorescence bract inconspicuous, brown, much shorter to ± equaling inflorescence, apex often clear, dentate;

bracts deep brown, margins dentate;

bracteoles deep brown, margins dentate.

asymmetric in appearance;

glomerules (1–)2–5, central glomerules sessile or nearly sessile, 3–9 × 2.5–6 mm;

capillary branches 2–8, arched in 1 direction, to 3.5 cm;

proximal inflorescence bract bladeless.

Flowers

tepals deep brown with narrow clear margins and apex, 1.7-2.1 mm;

anthers ± equaling filament length.

tepals brownish translucent (apex lacerate to entire), 2–3 mm, apex lacerate to entire;

anthers equal to or exceeding filaments.

Capsules

dark reddish to blackish, shining, spheric, 1.8-2.1 mm, usually exceeding tepals.

light chestnut brown, broadly 3-angled, shorter than tepals.

Seeds

translucent, clear brown, broadly elliptic, with few entangled hairs, 1-1.2 mm.

most failing to mature, brown (with few hairs present), 3-angled, 0.9–1.1 mm, few hairs present;

caruncle barely visible.

2n

= 24.

= 36.

Luzula arctica

Luzula kjellmaniana

Phenology Flowering and fruiting summer. Flowering and fruiting summer.
Habitat Wet, stony places on slopes and in dwarf shrub heaths in alpine and arctic tundra; circumpolar. Tundra
Elevation 0-1200 m (0-3900 ft) 50–2000 m (200–6600 ft)
Distribution
from FNA
AK; BC; LB; MB; NT; NU; QC; YT; Greenland; Eurasia
from FNA
AK; BC; NT; YT; ne Asia
[BONAP county map]
Discussion

Luzula kjellmaniana has light green culms, sheath throats essentially without hairs, and glabrous basal leaves that are flat toward the base and channeled toward the apex (the apex is abruptly pointed). Most seeds fail to mature.

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

Source FNA vol. 22, p. 263. FNA vol. 22.
Parent taxa Juncaceae > Luzula > subg. Luzula Juncaceae > Luzula > subg. Luzula
Sibling taxa
L. acuminata, 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. divaricata, L. echinata, L. groenlandica, L. hitchcockii, L. luzuloides, L. multiflora, L. orestera, L. pallidula, L. parviflora, L. piperi, L. rufescens, L. spicata, L. subcapitata, L. subcongesta, L. wahlenbergii
Synonyms L. nivalis L. beeringiana, L. multiflora subsp. kjellmanniana, L. nivalis var. latifolia, L.uzula tundricola
Name authority Blytt: in M. N. Blytt and A. G. Blytt, Norges Flora 1: 299. (1861) Miyabe & Kudo: Transactions of the Sapporo Natural History Society 5: 38. (1913)
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