Luzula arctica |
Luzula pallidula |
|
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arctic wood rush |
Eurasian woodrush, pale European wood rush |
|
Rhizomes | thickened. |
|
Culms | densely cespitose, 5-20 cm. |
cespitose, 9–35 cm. |
Leaves | sheaths brown to straw-colored; basal leaves to 10 cm × 4 mm; cauline leaves usually 2, reduced. |
basal leaves 6–11.5 cm × 1.5–4 mm, apex not callous, sparingly ciliate. |
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. |
umbellate-paniculate; glomerules 4–30 (each with 9–24 flowers), central glomerules sessile or nearly sessile, cylindric, 6–10 × 4 mm; branches straight, erect, to 3 cm; proximal inflorescence bract conspicuous, leaflike, equal to much longer than inflorescence; bracts clear, sometimes variegated with purple; bracteole margins dentate to lacerate. |
Flowers | tepals deep brown with narrow clear margins and apex, 1.7-2.1 mm; anthers ± equaling filament length. |
tepals clear to straw-colored throughout or centers brown with clear margins and apex, 1.5–2.6 mm; outer whorl exceeding inner whorl, (outer whorl apex awned); anthers equaling to 1.5 times filament length. |
Capsules | dark reddish to blackish, shining, spheric, 1.8-2.1 mm, usually exceeding tepals. |
light or dark reddish, shining, spheric, usually equaling inner tepal whorl. |
Seeds | translucent, clear brown, broadly elliptic, with few entangled hairs, 1-1.2 mm. |
translucent brown, ellipsoid, 0.7–1 mm; caruncle 0.2–0.3 mm. |
2n | = 24. |
= 12. |
Luzula arctica |
Luzula pallidula |
|
Phenology | Flowering and fruiting summer. | Flowering and fruiting early–late summer. |
Habitat | Wet, stony places on slopes and in dwarf shrub heaths in alpine and arctic tundra; circumpolar. | Moist to wet woods, grassy places, and clearings on rocky places and barrens |
Elevation | 0-1200 m (0-3900 ft) | 0–1000 m (0–3300 ft) |
Distribution |
AK; BC; LB; MB; NT; NU; QC; YT; Greenland; Eurasia |
NY; VT; NB; NF; QC; Eurasia [Introduced in North America] |
Discussion | Basal leaves of Luzula pallidula are sparingly ciliate. For discussion of the change of the widely known name for this species, see J. Kirschner (1990). (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 | Juncus pallescens, L. pallescens |
Name authority | Blytt: in M. N. Blytt and A. G. Blytt, Norges Flora 1: 299. (1861) | Kirschner: Taxon 39: 110. (1990) |
Web links |