Juncus biglumis

Linnaeus

Sp. Pl. 1: 328. 1753.

Illustrated
Treatment appears in FNA Volume 22.

Herbs, perennial, loosely cespitose, 0.25–1.6 dm. Culms nearly terete. Cataphylls 2–4. Leaves basal, 1–4; sheaths loose; auricles absent or rounded, 0.5 mm; blade imperfectly septate, ascending, nearly terete, 2–7 cm × 0.5–1.5 mm. Inflorescences heads, 1–2(–4)-flowered; primary bracts much longer than inflorescence. Flowers: tepals brown to blackish, oblong, 2.5–4 mm, apex obtuse; outer and inner series nearly equal; stamens 6, filaments 1–1.5 mm, anthers 0.5–0.7 mm; style deciduous, 0.3–0.4 mm. Capsules pale with dark purplish valve margins, pseudo-3-locular, oblate to narrowly ovoid, 4–5.5 × 1.7–2.3 mm, exceeding perianth, apex retuse. Seeds yellowish tan, fusiform-ovoid, 0.7–0.9 mm, short tailed. 2n = 120.


Phenology: Flowering and fruiting summer.
Habitat: Wet tundra and mossy margins of ponds and streams, wet gravel and open, rocky slopes in alpine zones
Elevation: 10–3400 m

Distribution

V22 308-distribution-map.jpg

Greenland, Alta., B.C., Man., Nfld. and Labr. (Labr.), N.W.T., Nunavut, Ont., Que., Yukon, Alaska, Colo., Mont., Wyo., n Europe, Asia.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Juncus biglumis"
Ralph E. Brooks* +  and Steven E. Clemants* +
Linnaeus +
Greenland +, Alta. +, B.C. +, Man. +, Nfld. and Labr. (Labr.) +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +, Colo. +, Mont. +, Wyo. +, n Europe +  and Asia. +
10–3400 m +
Wet tundra and mossy margins of ponds and streams, wet gravel and open, rocky slopes in alpine zones +
Flowering and fruiting summer. +
Illustrated +
Aalpini +  and Juncus sect. Alpini +
Juncus biglumis +
Juncus subg. Alpini +
species +