Juncus brachycephalus |
Juncus macrophyllus |
|
---|---|---|
small-head rush |
long-leaf rush, rush |
|
Habit | Herbs, perennial, cespitose, 2–7 dm. | Herbs, perennial, tufted, 2–10 dm. |
Rhizomes | poorly developed. |
|
Culms | erect, 1–4 mm diam., smooth. |
erect, nearly terete to slightly compressed, never rooting at nodes. |
Cataphylls | 1–2, straw-colored to pink, 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 several, cauline 1–3; auricles rounded, 1–3 mm, apex acutish, membranous; blade pale green, basal blade striate, channeled, basal 1/2–1 times length of culm; cauline 8–15 cm × 1–3 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. |
glomerules, 8–25, each with 3–5 flowers, open; primary bract much shorter than inflorescence. |
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 greenish with reddish or brown tinge, lanceolate, 5–6 mm, outer series shorter; stamens 6, filaments 0.5–1 mm, anthers 1.8–2.6 mm; style 0.5–1 mm. |
Capsules | exserted, chestnut to dark brown, imperfectly 3-locular, obconic, 2.4–3.8 mm, apex acute proximal to beak, valves separating at dehiscence. |
tan, 3-locular, obovoid, 3–4.5 mm, shorter than perianth. |
Seeds | ellipsoid to fusiform, 0.8–1.2 mm, tailed; body covered with whitish translucent veil. |
ovoid, 0.6 mm, not tailed. |
2n | = 80. |
|
Juncus brachycephalus |
Juncus macrophyllus |
|
Phenology | Fruiting summer–early fall. | Flowering and fruiting summer. |
Habitat | Calcareous marshes, wet meadows, and wetland shores | Wet banks and meadows in chaparral and low mountains |
Elevation | 100–200 m (300–700 ft) | 700–2600 m (2300–8500 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;
|
AZ; CA; NV
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Septati | Juncaceae > Juncus > subg. Graminifolii |
Sibling taxa | ||
Synonyms | J. canadensis var. brachycephalus | J. canaliculatus, J. longistylis var. scabratus |
Name authority | (Engelmann) Buchenau: Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 12: 268. (1890) | Coville: University of California Publications in Botany 1: 65. (1902) |
Web links |