Juncus torreyi |
Juncaceae |
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Torrey's rush |
rush family |
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Habit | Herbs, perennial, rhizomatous, (3–)4–10 dm. | Herbs, perennial, occasionally annual, usually rhizomatous, orsometimes cespitose. |
Rhizomes | 1–3 mm diam., with swollen nodes. |
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Culms | erect, terete, 3–5 mm diam., smooth. |
round or flat. |
Cataphylls | 0. |
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Leaves | basal 1–3, cauline 2–5, auricles 1–4 mm, apex rounded, scarious; blade strawberry-colored, green, or pink, terete, 13–30 cm × 1–5 mm. |
mostly basal; sheath margins fused or overlapping, often with 2 earlike extensions (auricles) at blade junction; blade flat or round, glabrous or margins hairy. |
Inflorescences | terminal clusters of 1–23 heads or single heads, 2–5.5 cm, branches spreading; primary bract erect to ascending; heads 25–100-flowered, globose, 10–15 mm diam. |
of headlike clusters or single flowers variously arranged; bracts subtending inflorescence 1 or more2, mostly leaflike; bracts subtending inflorescence branches 1–2, reduced; bracteoles subtending solitary flower 0–2, translucent, reduced. |
Flowers | tepals green to straw-colored, occasionally reddish, lanceolate-subulate; outer tepals (3.7–)4–6 mm, apex acuminate; inner tepals (3–) 3.4–4.6 mm, apex acuminate; stamens 6, anthers 1/2 filament length. |
usually bisexual, radially symmetric; sepals and petals similar, persistent, green to brown or purplish black; stamens usually 3 or 6; anthers persistent, linear; pistils 1; ovaries superior, locules 1 or 3, placentas 1 and basal or 3 and axile or parietal; stigmas generally longer than styles. |
Fruits | capsules, loculicidal. |
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Capsules | equaling perianth or slightly exserted, straw-colored or chestnut brown, 1-locular, lance-subulate, 4.3–5.7 mm, apex tapering to subulate tip, valves separating at dehiscence, fertile throughout or only proximal to middle. |
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Seeds | oblong to ellipsoid, 0.4–0.5 mm, not tailed; body clear yellow-brown. |
3–many, often with white appendages on 1 or both ends. |
2n | = 40. |
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Juncus torreyi |
Juncaceae |
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Phenology | Fruiting early summer–fall. | |
Habitat | Wet sandy shores, edges of sloughs, along slightly alkaline watercourses, swamps, sometimes on clay soils, calcareous wet meadows, and alkaline soils | |
Elevation | 0–600 | |
Distribution |
AL; AR; AZ; CA; CO; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; ON; QC; SK; Mexico (Baja California, probably elsewhere in n Mexico)
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Arctic and temperate regions; tropical mountains |
Discussion | Genera 9, species ca. 350 (2 genera, 1108 species in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key | ||
Source | FNA vol. 22. | FNA vol. 22, p. 211. |
Parent taxa | Juncaceae > Juncus > subg. Septati | |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | J. nodosus var. megacephalus, J.uncus megacephalus, J.uncus nodosus var. megacephalus, J.uncus megacephalus | |
Name authority | Coville: Bulletin of the Torrey Botanical Club 22:303. (1895) | A. L. Jussieu |
Web links |
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