Juncus gerardii |
Juncus lesueurii |
|
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black needle rush, blackgrass, blackgrass rush, Gerard's rush, saltmarsh rush, saltmeadow rush |
Lesueur's rush, salt rush |
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Habit | Herbs, perennial, 2–9 dm. | Herbs, perennial, 3–14 dm. |
Rhizomes | long- creeping. |
long- creeping. |
Culms | erect, 1–3 mm diam. |
|
Cataphylls | 1–3. |
several. |
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. |
blade absent. |
Inflorescences | 10–30(–80)-flowered, usually loose and somewhat lax, 2–16 cm; primary bract rarely surpassing inflorescence. |
lateral, 3–many-flowered, mostly loose; primary bract much longer than inflorescence. |
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. |
variously pedicellate; bracteoles membranous; tepals green, lanceolate, 5–8 mm, margins brown; inner series loosely subtending capsule at maturity, usually slightly shorter, margins scarious to clear, acutish; stamens 6, filaments 0.2–1.1 mm, anthers 0.9–2.3 mm; style 1–1.5 mm. |
Capsules | chestnut brown or brown, 3-locular, widely ellipsoid, (2.2–)2.5–3.2(–3.5) × 1.3–1.9 mm. |
3-locular, oblate to narrowly ovoid, 4–7 mm, shorter than or nearly equal to perianth. |
Seeds | dark brown, ellipsoid to lunate, 0.485–0.6(–0.67) mm, not tailed. |
dark amber, oblate to ellipsoid, 0.4–0.7 mm. |
2n | = ca. 80, 84. |
|
Juncus gerardii |
Juncus lesueurii |
|
Phenology | Flowering and fruiting late spring–summer. | Flowering and fruiting summer. |
Habitat | Forming extensive colonies in exposed coastal estuary meadows and salt marshes just above high- tide line, also inland | Borders of salt or freshwater marshes and usually near dunes along the coast |
Elevation | 0–500 m (0–1600 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; WA; BC
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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. bulbosus var. gerardii, J. fucensis, J. gerardii var. pedicellatus | J. balticus subsp. pacificus, J. lesueurii var. tracyi |
Name authority | Loiseleur-Deslongchamps: J. Bot. (Desvaux) 2: 284. (1809) | Bolander: Proceedings of the California Academy of Sciences 2: 179. 1863 (as leseurii) |
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