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Wahlenberg's wood rush

Piper's wood-rush, smooth woodrush

Rhizomes

short.

horizontal, short.

Culms

cespitose, 15–30(–35) cm.

densely cespitose, 10–30(–35) cm.

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 blade green, 5–10 cm × 2–4 mm, firm, essentially glabrous;

cauline leaves 2–3, 3–7 cm × 3–5 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.

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.

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.

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.

Capsules

dark brown, less than 2.5 mm, slightly longer than tepals;

beak absent.

dark brown, ellipsoid, shorter than 2.5 mm, longer than tepals;

beak absent.

Seeds

dark reddish brown, cylindric, 1.2–1.6 mm;

caruncle essentially absent.

light yellow-brown, lanceolate, narrowed at ends, 1.2 mm.

2n

= 24.

= 24.

Luzula wahlenbergii

Luzula piperi

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 Snowbeds and mesic heaths in subalpine and oceanic zones
Elevation 40–600 m (100–2000 ft) 400–2400 m (1300–7900 ft)
Distribution
from FNA
AK; BC; MB; NT; NU; QC; YT; Greenland; Eurasia
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; ID; MT; OR; WA; AB; BC; YT; e Asia
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 22. FNA vol. 22.
Parent taxa Juncaceae > Luzula > subg. Anthelaea Juncaceae > Luzula > subg. Anthelaea
Sibling taxa
L. acuminata, L. arctica, 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. acuminata, L. arctica, 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. rufescens, L. spicata, L. subcapitata, L. subcongesta, L. wahlenbergii
Synonyms Juncoides piperi, L. wahlenbergii subsp. piperi
Name authority Ruprecht: Fl. Samojed. Cisural. 58. (1845) (Coville) M. E. Jones: Bull. Biol. Ser. Bull. State Univ. Montana 15: 22. (1910)
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