Juncus howellii |
Juncus drummondii |
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Howell's rush |
Drummond rush, Drummond's rush, three-flower rush |
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Habit | Herbs, perennial, 2–6 dm. | Herbs, perennial, strongly tufted, to 4 dm. |
Rhizomes | long creeping. |
densely short-branched. |
Culms | erect, slightly compressed, never rooting at nodes. |
terete. |
Cataphylls | several. |
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Leaves | basal 2–4, cauline 2–3; auricles 1–3 mm, apex rounded to acutish, membranous; blade flat, 10–30 cdm × 2–4 mm, reduced distally, margins occasionally papillose. |
blade absent or rarely present, to 1 cm. |
Inflorescences | glomerules, usually 3–9, each with 3–8(–10) flowers, open, 2–9 cm; primary bract much shorter than inflorescence. |
2–5-flowered, loosely compact; primary bract usually longer than inflorescence. |
Flowers | tepals yellow-brown with green midstripe, lanceolate, 5–6.5 mm, margins clear; outer and inner series nearly equal, adaxially papillose; stamens 6, filaments 0.5–1 mm, anthers 1.8–2.6 mm; style 0.6 mm. |
pedicellate; tepals brown to chestnut brown with green midstripe, lanceolate or widely so, (4–)5–8 mm, margins clear; inner series loosely subtending capsule at maturity, shorter; stamens 6, filaments 0.7–1 mm, anthers 1.1–1.6 mm; style 0.2 mm. |
Capsules | tan, 3-locular, obovoid, 3–5 mm, shorter than perianth. |
brown to chestnut brown, 3-locular, oblate, 4.5–7(–8) × 1.8–2.2 mm, nearly equal to or exceeding perianth. |
Seeds | ovoid, body 0.5–0.7 mm, tails 0.2–0.4 mm. |
amber, body oblate, 0.5–0.6 mm. |
Juncus howellii |
Juncus drummondii |
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Phenology | Flowering and fruiting summer. | Flowering and fruiting summer. |
Habitat | Moist ground in mountain meadows | Exposed slopes, stream banks, and meadows in montane and alpine areas |
Elevation | 850–2500 m (2800–8200 ft) | 1600–4000 m (5200–13100 ft) |
Distribution |
CA; ID; OR; WA
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AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT; YT
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Discussion | Plants with capsules distinctly longer than the perianth have been referred to as Juncus drummondii var. subtriflorus. Those plants frequently occur sympatrically with J. drummondii (strict sense) through most of its range, leaving considerable doubt as to the value of recognizing such variation. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | J. compressus var. subtriflorus, J. drummondii var. longifructus, J. drummondii var. subtriflorus, J. subtriflorus, J. pauperculus | |
Name authority | F. J. Hermann: Leaflets of Western Botany 5: 182. (1949) | E. Meyer: in C. F. von Ledebour, Flora Rossica 4: 235. (1853) |
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