Juncus covillei |
Juncus phaeocephalus |
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Coville's rush |
brown-head rush |
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Habit | Herbs, perennial, strongly rhizomatous, 0.5–2.5 dm. | Herbs, perennial, rhizomatous, 2–9 dm. | ||||
Rhizomes | 2–3 mm diam. |
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Culms | erect, slightly flattened. |
erect, 2–5 mm diam. |
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Cataphylls | 2, chestnut brown, apex acute. |
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Leaves | basal 2–5, cauline 2–4; auricles absent or, if present, 0.5–1.5 mm, apex acute; blade flat, 5–15 cm × 2–3 mm. |
basal 2, cauline 1–2, light green; auricles absent; blade 1–15 cm × 2–5 mm. |
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Inflorescences | glomerules, 1–6, each with 3–7 flowers, open to aggregate, 2–6 cm; primary bract or distal leaves usually exceeding inflorescences. |
panicles of (2–)10–77 heads, 2–9.5 cm with ascending to erect branches, or heads solitary; primary bract erect; heads 3–35-flowered, spheric to obovoid, 0.5–1.2 mm diam. |
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Flowers | tepals usually brown, ovate-oblong, 3–4 mm, margins scarious; inner series slightly shorter, minutely papillate; stamens 6, filaments 0.8–1.4 mm, anthers 0.8–1.4 mm; style 1 mm. |
tepals dark brown to purplish brown, lanceolate, 3.3–4.8 mm, nearly equal; outer tepals acuminate, mucro subulate; inner tepals acuminate or cuspidate, mucro subulate; stamens 6, anthers 2–3 times length of filaments. |
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Capsules | 3-locular, narrowly ovoid, 4–5 mm. |
included, chestnut brown or straw-colored, 1-locular, oblong, 3.8–5.6 mm (including beak), apex acute proximal to beak, beak slightly exserted. |
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Seeds | narrowly ovoid, 0.3 mm, not tailed. |
obovoid, 0.5–0.6 mm, not tailed. |
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Juncus covillei |
Juncus phaeocephalus |
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Phenology | Fruiting summer. | |||||
Habitat | Meadows and borders of swamps | |||||
Elevation | 100–300 m (300–1000 ft) | |||||
Distribution |
CA; ID; MT; OR; WA; BC; Coastal to montane areas
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CA; OR; WA; Mexico (Baja California)
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Plants with more than 10 heads of 3–12 flowers have been separated as Juncus phaeocephalus var. paniculatus Engelmann. This variety is very similar to the neext species (Juncus macrandrus) and is probably better treated as part of that species. Until a more thorough study has been made of the entire subgenus, we are hesitant to make such a transfer. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 22. | FNA vol. 22. | ||||
Parent taxa | Juncaceae > Juncus > subg. Graminifolii | Juncaceae > Juncus > subg. Ensifolii | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | J. falcatus var. paniculatus | J. phaeocephalus var. paniculatus | ||||
Name authority | Piper: Contributions from the U. S. National Herbarium 11: 182. (1906) | Engelmann | ||||
Web links |
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