Luzula arctica |
Luzula kjellmaniana |
|
---|---|---|
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 |
AK; BC; LB; MB; NT; NU; QC; YT; Greenland; Eurasia |
AK; BC; NT; YT; ne Asia |
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 | ||
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) |
Web links |