Juncus hemiendytus |
Juncus subtilis |
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blood rush, dwarf rush, Herman's dwarf rush, Hermann's dwarf rush, juncus hemiendytus |
creeping rush, greater creeping rush, jonc délié |
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Habit | Herbs, annual, cespitose, 0.03–0.36 dm. | Herbs, perennial, emergent, rhizomatous (forming mats to 5 dm), 0.5–1 dm. | ||||
Rhizomes | 1 mm diam., nodes not swollen. |
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Culms | to 5. |
repent, floating or submersed, usually profusely branched, terete, 0.5–1 mm diam. |
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Cataphylls | absent. |
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Leaves | to 1.8 cm, 1/2–1 1/3 height of plant. |
basal 1–5, cauline 1–4, small fascicles of short capillary leaves often on rhizomes and stems; auricles 0.1–0.8 mm, apex acute, membranaceous; blade terete, 1.6–3 cm × 0.1–0.3 mm. |
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Inflorescences | solitary flowers. |
cymes, flowers 1–3 at 1–2 nodes, 1–4 cm, branches spreading to erect. |
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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 reddish, oblong; outer tepals 1.8–2.8 mm, obtuse; inner tepals 2.2–4.4 mm, obtuse; stamens 6, anthers 3/4 to equal filament length. |
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Capsules | reddish, 2–- or 3-locular, obovoid to ellipsoid or oblate, 1.9–3.5 × 1–2 mm. |
exserted, chestnut brown, 1-locular, ovoid to narrowly ovoid, 2.4–5 mm, apex acute proximal to beak, valves separating at dehiscence. |
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Seeds | ovoid to oblate, 0.3–0.55 mm. |
ovoid, 0.3–0.5 mm, not tailed; body clear yellow-brown. |
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2n | = 40. |
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Juncus hemiendytus |
Juncus subtilis |
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Phenology | Fruiting late summer–early fall. | |||||
Habitat | Muddy, sandy or gravelly shores, fens in decomposed peat, fine muds rich in humus, and submersed in brackish pools | |||||
Elevation | 0–200 m (0–700 ft) | |||||
Distribution |
ME; NB; NL; ON; QC; Greenland |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Flowers are rarely replaced by bulbils. Most Greenland collections are sterile. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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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. uliginosus var. subtilis, J. pelocarpus var. subtilis, J. pelocarpus var. fluitans | ||||
Name authority | F. J. Hermann: Leaflets of Western Botany 5: 118. (1948) | E. Meyer: Syn. Luzul. 31. (1823) | ||||
Web links |
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