Luzula wahlenbergii |
Luzula groenlandica |
|
---|---|---|
Wahlenberg's wood rush |
Greenland wood rush |
|
Rhizomes | short. |
|
Culms | cespitose, 15–30(–35) cm. |
cespitose, straight, 10–30 cm, stiff. |
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. |
basal leaves (with several outer dead ones usually present), to 9 cm × 3 mm, apex callous, sparingly pilose; cauline leaves to 5 cm × 2 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. |
glomerules 1(–3); peduncles, not exceeding 5 mm; proximal inflorescence bract conspicuous, leaflike, usually conspicuously exceeding inflorescence; bracts mostly inconspicuous; bracteoles clear or light to dark brown, occasionally to 1/2 tepal length. |
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. |
tepals with broad clear margins and apex (apex acute-acuminate), 1.9–2.5 mm, apex acute-acuminate; outer whorl ± equaling to exceeding inner whorl; anthers ± equaling filaments. |
Capsules | dark brown, less than 2.5 mm, slightly longer than tepals; beak absent. |
dark reddish, shining, ovoid, generally shorter than tepals. |
Seeds | dark reddish brown, cylindric, 1.2–1.6 mm; caruncle essentially absent. |
translucent, brown, ellipsoid, 0.9–1.1 mm; caruncle barely visible. |
2n | = 24. |
= 24. |
Luzula wahlenbergii |
Luzula groenlandica |
|
Phenology | Flowering and fruiting late summer. | Flowering and fruiting summer. |
Habitat | Wet mossy arctic and alpine tundra, lake shores, alluvial rivers, shores of alpine creeks, gneissic seashores | Sandy sea shores with herbaceous vegetation to turfy tundra, often by water, to alpine flats |
Elevation | 40–600 m (100–2000 ft) | 0–400 m (0–1300 ft) |
Distribution |
AK; BC; MB; NT; NU; QC; YT; Greenland; Eurasia |
AK; BC; LB; MB; NT; NU; QC; YT; Greenland |
Discussion | The culms of Luzula groenlandica are straight and stiff; basal leaves are sparingly pilose. (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 | ||
Name authority | Ruprecht: Fl. Samojed. Cisural. 58. (1845) | Böcher: Meddelelser om Gronland 147: 18. (1950) |
Web links |