Juncus tenuis |
Juncus parryi |
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path rush, poverty or slender rush, poverty rush, slender rush |
Parry rush, Parry's rush |
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Habit | Herbs, perennial, tufted, 1.5–5 dm. | Herbs, perennial, strongly tufted, 0.5–3 dm. |
Rhizomes | densely branching. |
densely short-branched. |
Culms | few–20. |
terete. |
Cataphylls | several. |
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Leaves | basal, (1–)2–3; auricles 2–5 mm, apex acute, membranous; blade flat, 3–12 cm × 0.5–1 mm, margins entire. |
auricles 0.2–0.3 mm, apex acute to rounded, scarious. |
Inflorescences | 5–40-flowered, borne congested or branch internodes ca. as long as tepals, ssomewhat loose, 1–5 cm; primary bract usually longer than inflorescence. |
1–3-flowered, open; primary bract terete, 2–4 cm, usually longer than inflorescence. |
Flowers | bracteoles 2; tepals greenish, lanceolate, 3.3–4.4 mm; outer and inner series nearly equal; stamens 6, filaments 0.5–0.9 mm, anthers 0.1–0.2 mm; style 0.1–0.2 mm. |
pedicellate; bracteoles broadly ovate; tepals light brown with green midstripe, lanceolate, 5.5–9 mm, margins scarious; 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 or light brown, 1-locular to pseudo-3-locular, ellipsoid, (3.3–)3.8–4.7 × (1.1–)1.3–1.7 mm, nearly equal to tepals. |
tan, 3-locular, narrowly oblong, 6–9 × 1.5–2 mm, usually exceeding perianth. |
Seeds | tan, ellipsoid to lunate, (0.52–)5.5–0.65(–0.7) mm, not tailed. |
amber, body 0.6 mm, tails 0.4 mm. |
2n | = 80. |
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Juncus tenuis |
Juncus parryi |
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Phenology | Flowering spring–early summer. | Flowering and fruiting summer. |
Habitat | Exposed or shaded sites in soils ranging from sandy to clayey under moist or drier conditions, oftentimes these sites naturally or otherwise disturbed (e.g., game or human trails) | Exposed rocky slopes and stream banks in montane and alpine areas, conifer forests |
Elevation | 1500–4000 m (4900–13100 ft) | |
Distribution |
AK; 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; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NS; ON; PE; QC; SK [Introduced worldwide]
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CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC
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Discussion | Juncus tenuis occurs throughout North America. It is particularly abundant in northeastern United States and eastern Canada, although infrequent in the south and west. Through the use of isozyme electrophoresis, hybridization can be demonstrated between various members of the Juncus tenuis complex, including Juncus tenuis, J. anthelatus, J. interior, J. secundus, and J. dichotomus (R. E. Brooks, unpubl.). Juncus ××oronensis is thought to be a hybrid between J. tenuis and J. vaseyi in the northeast. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Poiophylli | Juncaceae > Juncus > subg. Genuini |
Sibling taxa | ||
Synonyms | J. bicornis, J. bicornis var. williamsii, J. macer, J. macer, J. macer var. williamsii, J. tenuis var. bicornis, J. tenuis var. multicornis, J. tenuis var. williamsii | J. drummondii var. parryi |
Name authority | Willdenow: Sp. Pl. 2(1): 214. (1799) | Engelmann |
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