Juncus gerardii |
Juncus capillaris |
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black needle rush, blackgrass, blackgrass rush, Gerard's rush, saltmarsh rush, saltmeadow rush |
hair-stem dwarf rush, hair-stem rush, hairystem dwarf rush, slender stem dwarf rush |
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Habit | Herbs, perennial, 2–9 dm. | Herbs, annual, cespitose, 0.09–0.6 dm. |
Rhizomes | long- creeping. |
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Culms | to 20. |
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Cataphylls | 1–3. |
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Leaves | basal, (1–)2–4; auricles 0.4–0.6(–0.8) mm, scarious; blade flat or somewhat channeled, 10–40 cm × 0.4–0.7 mm, margins entire. |
to 2.2 cm. |
Inflorescences | 10–30(–80)-flowered, usually loose and somewhat lax, 2–16 cm; primary bract rarely surpassing inflorescence. |
headlike clusters, each with 1–2 flowers; bracts subtending inflorescence 2–4, ovate, inconspicuous, 0.8–1.5 mm, membranous, apex acute. |
Flowers | bracteoles 2; tepals dark brown or blackish, lanceolate-ovate to oblong, 2.6–3.2(–3.8) mm; inner and outer series nearly equal, apex obtuse; stamens 6, filaments 0.4–0.7 mm, anthers 1.1–1.6(–1.8) mm; style 0.4 mm. |
tepals 4–6, chestnut brown to black, 1.8–2.8 × 0.8–1.5 mm; inner series usually slightly longer than outer, apex acuminate to attenuate; stamens 2–3, filaments 0.6–1.1 mm, anthers 0.3–0.4 mm; style 0.1–0.3 mm, stigma 0.4–0.6 mm. |
Capsules | chestnut brown or brown, 3-locular, widely ellipsoid, (2.2–)2.5–3.2(–3.5) × 1.3–1.9 mm. |
tan or apex reddish, 2– or 3-locular, globose to obovoid, 1.2–2 × 1.1–1.5 mm, usually shorter than tepals. |
Seeds | dark brown, ellipsoid to lunate, 0.485–0.6(–0.67) mm, not tailed. |
ellipsoid-ovoid, 0.5–0.8 mm. |
n | = 18. |
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2n | = ca. 80, 84. |
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Juncus gerardii |
Juncus capillaris |
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Phenology | Flowering and fruiting late spring–summer. | Flowering spring–mid summer. |
Habitat | Forming extensive colonies in exposed coastal estuary meadows and salt marshes just above high- tide line, also inland | Moist, bare flats, short turf, and mossy areas in meadows, stream banks, and seepage areas on outcrops (usually granite) |
Elevation | 1200–3200 m (3900–10500 ft) | |
Distribution |
CO; CT; DE; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; MT; ND; NH; NJ; NY; OH; OR; OR; PA; RI; UT; VA; VT; WA; WI; BC; MB; NB; NF; NS; ON; PE; QC; SPM; Greenland; Europe; Asia
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CA; OR |
Discussion | Juncus capillaris occurs in California in the Sierra Nevada and in Oregon in the Steens Mountains. (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. Graminifolii |
Sibling taxa | ||
Synonyms | J. bulbosus var. gerardii, J. fucensis, J. gerardii var. pedicellatus | |
Name authority | Loiseleur-Deslongchamps: J. Bot. (Desvaux) 2: 284. (1809) | F. J. Hermann: Leaflets of Western Botany 5: 116. (1948) |
Web links |
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