Juncus gerardii |
Juncus maritimus |
|
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black needle rush, blackgrass, blackgrass rush, Gerard's rush, saltmarsh rush, saltmeadow rush |
sea rush, seaside rush |
|
Habit | Herbs, perennial, 2–9 dm. | Herbs, perennial, 5–10 dm. |
Rhizomes | long- creeping. |
thick. |
Culms | closely set along rhizomes, 2–3.5 mm diam. |
|
Cataphylls | 1–3. |
3–5. |
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. |
basal, 2–4; auricles absent; blade terete, 40–60 cm × 1–2 mm. |
Inflorescences | 10–30(–80)-flowered, usually loose and somewhat lax, 2–16 cm; primary bract rarely surpassing inflorescence. |
glomerules, to 100, each with 2–4 flowers, congested to open, 5–19 × 2–5 cm; primary bracts somewhat inflated, usually surpassing 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. |
tepals straw-colored; outer series 2.8–2.9 mm, apex acute; inner series elliptic, 2.3–2.5 mm, apex obtuse; stamens 6, 1.4–1.9 mm, anthers 2 times length of filaments; style 1–1.2 mm. |
Capsules | chestnut brown or brown, 3-locular, widely ellipsoid, (2.2–)2.5–3.2(–3.5) × 1.3–1.9 mm. |
straw-colored, 3-locular, ovoid to ellipsoid, 2.5–3.5 × 1.2– × 1.5 mm, nearly equal to slightly exceeding perianth. |
Seeds | dark brown, ellipsoid to lunate, 0.485–0.6(–0.67) mm, not tailed. |
brown, ellipsoid, body 0.6–0.7 mm, tails 0.5–1.2 mm. |
2n | = ca. 80, 84. |
= 40, 48. |
Juncus gerardii |
Juncus maritimus |
|
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 | Coastal salt marshes, saline meadows, and sand dunes |
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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NY; Europe; Asia; Africa [Introduced in North America] |
Discussion | It is believed that this species has not been collected in North America since the late 1800s, when it was known to occur on Long Island, New York. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Poiophylli | Juncaceae > Juncus > subg. Juncus |
Sibling taxa | ||
Synonyms | J. bulbosus var. gerardii, J. fucensis, J. gerardii var. pedicellatus | |
Name authority | Loiseleur-Deslongchamps: J. Bot. (Desvaux) 2: 284. (1809) | Lamarck: in J. Lamarck et al., Encycl. 3: 264. (1789) |
Web links |
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