Juncus macrophyllus |
Juncus brevicaudatus |
|
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long-leaf rush, rush |
narrow-panicle rush, short-tail rush |
|
Habit | Herbs, perennial, tufted, 2–10 dm. | Herbs, perennial, cespitose, 1.4–5.5(–7) dm. |
Rhizomes | poorly developed. |
|
Culms | erect, nearly terete to slightly compressed, never rooting at nodes. |
erect, terete, 1–3 mm diam., smooth. |
Cataphylls | 0–1, straw-colored to pink, apex acute. |
|
Leaves | 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. |
basal 1–3, cauline 1–2; auricles 0.5–3 mm, apex rounded to truncate, scarious; blade terete, 1.5–25 cm × 0.5–2.5 mm. |
Inflorescences | glomerules, 8–25, each with 3–5 flowers, open; primary bract much shorter than inflorescence. |
terminal panicles or racemes of 2–35 heads, 1–12 cm, branches erect; primary bract erect; heads 2–8-flowered, ellipsoid to narrowly obconic, 2–9 mm diam. |
Flowers | 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. |
tepals green to light brown, lanceolate; outer tepals 2.3–3.1 mm, apex acuminate to rarely obtuse; inner tepals 2.5–3.2 mm, apex acuminate; stamens 3 (or 6), anthers 1/4–1/2 filament length. |
Capsules | tan, 3-locular, obovoid, 3–4.5 mm, shorter than perianth. |
exserted, chestnut brown, imperfectly 3-locular, narrowly ellipsoid to prismatic, 3.2–4.8 mm, apex acute proximal to beak, valves separating at dehiscence. |
Seeds | ovoid, 0.6 mm, not tailed. |
fusiform, 0.7–1.2 mm, tailed; body covered with whitish translucent veil. |
2n | = 80. |
|
Juncus macrophyllus |
Juncus brevicaudatus |
|
Phenology | Flowering and fruiting summer. | Fruiting mid summer–fall. |
Habitat | Wet banks and meadows in chaparral and low mountains | Generally in acidic or peaty moist sites, including emergent shorelines and aroundg hot springs |
Elevation | 700–2600 m (2300–8500 ft) | 100–2500 m (300–8200 ft) |
Distribution |
AZ; CA; NV
|
AZ; CO; CT; MA; MD; ME; MI; MN; MT; NC; NH; NY; OR; PA; RI; TN; UT; VA; VT; WI; WV; WY; AB; BC; MB; NB; NL; NS; ON; PE; QC; SK
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Discussion | Populations from about around hot springs in the west have been separated as Juncus tweedyi Rydberg, but no morphologic distinction appears to exist between J. tweedyi and J. brevicaudatus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Graminifolii | Juncaceae > Juncus > subg. Septati |
Sibling taxa | ||
Synonyms | J. canaliculatus, J. longistylis var. scabratus | J. canadensis var. brevicaudatus, J. canadensis var. coarctatus, J. canadensis var. kuntzei, J. coarctatus, J. kuntzei, J. tweedyi |
Name authority | Coville: University of California Publications in Botany 1: 65. (1902) | (Engelmann) Fernald: Rhodora 6: 35. (1904) |
Web links |