Juncus brachycephalus |
Juncus macrandrus |
|
---|---|---|
small-head rush |
long-anther rush |
|
Habit | Herbs, perennial, cespitose, 2–7 dm. | Herbs, perennial, rhizomatous, 2.6–6.5 dm. |
Rhizomes | 1.5–3.5 mm diam. |
|
Culms | erect, 1–4 mm diam., smooth. |
erect, 1.5–3 mm diam. |
Cataphylls | 1–2, straw-colored to pink, apex acute. |
2, chestnut brown, apex acute. |
Leaves | basal 1–3, cauline 1–2; auricles 0.6–1.5 mm, apex rounded, scarious; blade terete to compressed, 0.2–12 cm × 0.5–2 mm. |
basal 2, cauline 1–2, light green; auricles absent; blade 2.5–20.5 cm × 2–3 mm. |
Inflorescences | panicles of 5–80 heads, 5–25 cm, branches ascending; primary bract erect; heads 2–6-flowered, ellipsoid to obovoid, 2–5 mm diam. |
panicles of 10–50 heads, 4–10 cm, ascending to erect branches; primary bract erect; heads 3–22-flowered, obovoid to hemispheric, 5–11 mm diam. |
Flowers | tepals green to light brown, lanceolate; outer tepals 1.8–2.5 mm, apex obtuse to nearly acute; inner tepals 2–2.8 mm, apex obtuse to nearly acute; stamens 3 or 6, anthers 1/2 filament length. |
tepals dark brown to purplish brown, lanceolate, 3–4 mm, nearly equal; outer tepals acuminate, mucro subulate; inner tepals acuminate or cuspidate, mucro subulate; stamens 6, anthers 2.5–3 times filament length. |
Capsules | exserted, chestnut to dark brown, imperfectly 3-locular, obconic, 2.4–3.8 mm, apex acute proximal to beak, valves separating at dehiscence. |
included, chestnut brown, 1-locular, oblong, 2.3–3.2 xx–xx mm (including beak), apex acuminate proximal to beak, beak slightly exserted. |
Seeds | ellipsoid to fusiform, 0.8–1.2 mm, tailed; body covered with whitish translucent veil. |
obovoid, 0.5–0.6 mm, not tailed. |
2n | = 80. |
|
Juncus brachycephalus |
Juncus macrandrus |
|
Phenology | Fruiting summer–early fall. | Fruiting summer. |
Habitat | Calcareous marshes, wet meadows, and wetland shores | Wet places, montane conifer forests |
Elevation | 100–200 m (300–700 ft) | 1700–2900 m (5600–9500 ft) |
Distribution |
AL; CO; CT; GA; IL; IN; MA; ME; MI; MN; NC; ND; NH; NJ; NY; OH; OK; PA; TN; VA; VT; WI; WV; NB; NS; ON; QC;
|
CA
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Septati | Juncaceae > Juncus > subg. Ensifolii |
Sibling taxa | ||
Synonyms | J. canadensis var. brachycephalus | |
Name authority | (Engelmann) Buchenau: Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 12: 268. (1890) | Coville: in L. Abrams and R. S. Ferris, Illustrated Flora of the Pacific States 1: 367, fig. 900. (1923) |
Web links |