Luzula piperi |
Luzula kjellmaniana |
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Piper's wood-rush, smooth woodrush |
tundra woodrush |
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Rhizomes | horizontal, short. |
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Culms | densely cespitose, 10–30(–35) cm. |
loosely cespitose, light green, 15–25 cm. |
Leaves | basal blade green, 5–10 cm × 2–4 mm, firm, essentially glabrous; cauline leaves 2–3, 3–7 cm × 3–5 mm. |
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 | branches spreading less than 90°, lax; proximal inflorescence bract leaflike, 0.8–1.5 cm; bracts and bracteoles brown, clear at apex, margins strongly ciliate. |
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 | single or in clusters of 2–3; tepals dark brown, 1–2.5 mm, ± equal, apex acute, not reflexed; anthers ± equaling filament length; stigmas 5 times style length. |
tepals brownish translucent (apex lacerate to entire), 2–3 mm, apex lacerate to entire; anthers equal to or exceeding filaments. |
Capsules | dark brown, ellipsoid, shorter than 2.5 mm, longer than tepals; beak absent. |
light chestnut brown, broadly 3-angled, shorter than tepals. |
Seeds | light yellow-brown, lanceolate, narrowed at ends, 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 piperi |
Luzula kjellmaniana |
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Phenology | Flowering and fruiting summer. | Flowering and fruiting summer. |
Habitat | Snowbeds and mesic heaths in subalpine and oceanic zones | Tundra |
Elevation | 400–2400 m (1300–7900 ft) | 50–2000 m (200–6600 ft) |
Distribution |
AK; ID; MT; OR; WA; AB; BC; YT; e Asia
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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.) |
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Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Luzula > subg. Anthelaea | Juncaceae > Luzula > subg. Luzula |
Sibling taxa | ||
Synonyms | Juncoides piperi, L. wahlenbergii subsp. piperi | L. beeringiana, L. multiflora subsp. kjellmanniana, L. nivalis var. latifolia, L.uzula tundricola |
Name authority | (Coville) M. E. Jones: Bull. Biol. Ser. Bull. State Univ. Montana 15: 22. (1910) | Miyabe & Kudo: Transactions of the Sapporo Natural History Society 5: 38. (1913) |
Web links |
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