Juncus hemiendytus |
Juncus pelocarpus |
|||||
---|---|---|---|---|---|---|
blood rush, dwarf rush, Herman's dwarf rush, Hermann's dwarf rush, juncus hemiendytus |
brown-fruit rush, jonc à fruits bruns |
|||||
Habit | Herbs, annual, cespitose, 0.03–0.36 dm. | Herbs, perennial, rhizomatous, 0.3–7 dm. | ||||
Rhizomes | 1–3 mm diam., nodes not swollen. |
|||||
Culms | to 5. |
erect, terete, 1–2 mm diam., smooth. |
||||
Cataphylls | 0 (rarely 1, straw-colored, apex obtuse). |
|||||
Leaves | to 1.8 cm, 1/2–1 1/3 height of plant. |
basal 0–2, cauline 1–4, small fascicles of short capillary leaves often on rhizomes and stems; auricles 0.3–1 mm, apex rounded, membranaceous; blade terete, 1.5–11 cm × 0.8–1.1 mm. |
||||
Inflorescences | solitary flowers. |
terminal cymes, flowers single or paired at nodes, (rarely in 3s), 2–25 cm, branches spreading to erect; primary bract erect. |
||||
Flowers | 2-merous; : tepals 4(–6), erect to recurved at maturity, reddish, 1.5–3 × 0.5–1.2 mm; outer and outer series nearly equal, apex rounded to acute; stamens 2(–3), filaments 0.5–1.4 mm, anthers 0.3–0.7 mm; style 0.1–0.4 mm, stigma 2(–3), 0.3–1 mm. |
tepals straw-colored, oblong; outer tepals 1.6–2.3 mm, apex obtuse; inner tepals 1.8–2.8 mm, apex obtuse; stamens 6, anthers 2–3 times filament length. |
||||
Capsules | reddish, 2–- or 3-locular, obovoid to ellipsoid or oblate, 1.9–3.5 × 1–2 mm. |
included to exserted, chestnut brown, 1-locular, narrowly ovoid, 1.5–3.5 mm, apex acute proximal to beak, valves separating at dehiscence, fertile only proximal to middle. |
||||
Seeds | ovoid to oblate, 0.3–0.55 mm. |
ovoid, 0.3–0.5 mm, not tailed; body clear yellow-brown. |
||||
2n | = 40. |
|||||
Juncus hemiendytus |
Juncus pelocarpus |
|||||
Phenology | Fruiting late summer–fall. | |||||
Habitat | Shores, peat bogs, sandy soils, pools, occasionally submersed in lakes, rarely in salt water | |||||
Elevation | 0–600 m (0–2000 ft) | |||||
Distribution |
AL; CT; DC; DE; FL; GA; IN; MA; MD; ME; MI; MN; NC; NH; NJ; NY; OH; PA; RI; SC; VA; VT; WI; BC; NB; NF; NS; ON; PE; QC
|
|||||
Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Populations from Virginia and south have been separated as Juncus pelocarpus var. crassicaudex (J. abortivus) based on their taller culms and thicker rhizomes. The evidence used to support the varietal status for the southeastern plants (N. A. Murray and D. M. Johnson 1987) clearly demonstrates that these plants are the southern end of a cline. The flowers are often replaced by bulbils. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 22, p. 232. | FNA vol. 22, p. 245. | ||||
Parent taxa | Juncaceae > Juncus > subg. Graminifolii | Juncaceae > Juncus > subg. Septati | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | J. brachystylus, J. brachystylus var. uniflorus, J. triformis var. uniflorus | J. abortivus, J. pelocarpus var. crassicaudex, J. pelocarpus var. sabulonensis | ||||
Name authority | F. J. Hermann: Leaflets of Western Botany 5: 118. (1948) | E. Meyer: Syn. Luzul. 30. (1823) | ||||
Web links |
|