Juncus capitatus |
Juncus acuminatus |
|
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capitate rush, dwarf rush, leafy-bract dwarf rush |
knotty-leaf rush, sharp-fruit rush, tapered rush, tapertip rush |
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Habit | Herbs, annual, cespitose, 0.3–1 dm. | Herbs, perennial, cespitose, not rhizomatous, 1.4–10 dm. |
Culms | to 20. |
erect, terete, 1–3 mm diam., smooth. |
Cataphylls | 1–2, gray, apex acute. |
|
Leaves | basal; auricles absent; blade 0.5–2.5 cm × 0.5 mm. |
basal 1–2, cauline 1–2; auricles 1–1.5 mm, apex rounded, scarious; blade green, straw-colored, or pink, nearly terete, 1–40 cm. |
Inflorescences | glomerules 1–2, each with 2–10(–14) flowers; bracts subtending inflorescence 1(–2), foliose, clearly surpassing inflorescence. |
terminal panicles of 5–50 heads, 5–15 cm, branches ascending; primary bract erect; heads (2–)5–20(–50)-flowered, hemispheric (to spheric), 3–10 mm diam. |
Flowers | tepals 6, tan to brownish, subulate, lanceolate-ovate, 3.5–4.5(–5) mm, 2 times length of inner tepals, margins scarious; inner series delicate, shorter, apex acute; stamens 3, filaments 1 mm, anthers 0.5 mm; style 0.4–0.7 mm. |
tepals light brown to greenish, lanceolate, 2.6–3.5(–3.9) mm, apex acuminate; stamens 3 (or 6), anthers 1/3 filament length. |
Capsules | tan to reddish brown, 3-locular, globose to obovoid, 1.2–1.7 mm, shorter than tepals. |
equaling perianth or slightly exserted, straw-colored, 1-locular, ellipsoid to narrowly ovoid, 2.8–3.5(–4) mm, apex acute, valves separating at dehiscence, fertile throughout or only proximal to middle. |
Seeds | ellipsoid-ovoid, 0.3–0.4 mm. |
ellipsoid to oblong, 0.3–0.4 mm, not tailed; body clear yellow-brown. |
2n | = 18. |
= 40. |
Juncus capitatus |
Juncus acuminatus |
|
Phenology | Flowering and fruiting spring. | Fruiting early summer–fall. |
Habitat | Moist to wet areas, usually in sandy, often disturbed soil such as roadsides or along trails | Shores, swamps, ditches, springs, wet meadows, and rock outcrops |
Elevation | below 1000 m (below 3300 ft) | 0–2200 m (0–7200 ft) |
Distribution |
CA; LA; OK; TX; native; Africa (north); Europe; Asia (Near East) [Introduced in North America]
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AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NM; NY; OH; OK; OR; PA; RI; SC; TN; TX; VA; VT; WA; WI; WV; BC; NS; ON; QC; Mexico; Central America (Honduras)
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Graminifolii | Juncaceae > Juncus > subg. Septati |
Sibling taxa | ||
Synonyms | J. acuminatus var. legitimus, J. pallescens, J. pondii | |
Name authority | Weigel: Observ. Bot. 28. (1772) | Michaux: Flora Boreali-Americana 1: 192. (1803) |
Web links |
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