Juncus hemiendytus |
Juncus compressus |
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blood rush, dwarf rush, Herman's dwarf rush, Hermann's dwarf rush, juncus hemiendytus |
compressed rush, round-fruit rush |
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Habit | Herbs, annual, cespitose, 0.03–0.36 dm. | Herbs, perennial, to 8 dm. | ||||
Rhizomes | short- creeping or densely branching, if densely branching herb appearing cespitose. |
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Culms | to 5. |
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Cataphylls | 1–3. |
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Leaves | to 1.8 cm, 1/2–1 1/3 height of plant. |
basal and cauline, 1–2; auricles 0.3–0.5 mm, scarious to membranous; blade flat to slightly channeled, 5–35 cm × 0.8–2 mm, margins entire. |
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Inflorescences | solitary flowers. |
5–60-flowered, lax, loose to moderately congested, 1.5–8 cm; primary bract usually exceeding inflorescence. |
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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. |
bracteoles 2; tepals brownish, ovate to oblong, 1.7–2.7 mm; inner and outer series nearly equal, apex obtuse; stamens 6, filaments 0.5–0.7 mm, anthers 0.6–1 mm; style 0.3 mm. |
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Capsules | reddish, 2–- or 3-locular, obovoid to ellipsoid or oblate, 1.9–3.5 × 1–2 mm. |
brown or darker, pseudo-3-locular, widely ellipsoid to obovoid, 2.5–3.5 × 1.4–1.8 mm, exceeding tepals. |
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Seeds | ovoid to oblate, 0.3–0.55 mm. |
light brown, ellipsoid to lunate, 0.35–0.556 mm, not tailed. |
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2n | = 44. |
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Juncus hemiendytus |
Juncus compressus |
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Phenology | Flowering and fruiting late spring–early summer. | |||||
Habitat | Disturbed ground, especially ditches, along railroads and banks of canals and roadsides, frequently in saline or alkaline soils | |||||
Elevation | 1500–2100 m (4900–6900 ft) | |||||
Distribution |
CO; MD; ME; MI; MN; MT; ND; NE; NY; UT; WI; WY; MB; NF; NS; ON; QC; Europe; w Asia [Introduced in North America]
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Discussion | Varieties 2 (2 in the flora). (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. | ||||
Parent taxa | Juncaceae > Juncus > subg. Graminifolii | Juncaceae > Juncus > subg. Poiophylli | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | J. brachystylus, J. brachystylus var. uniflorus, J. triformis var. uniflorus | J. bulbosus, J. supinus | ||||
Name authority | F. J. Hermann: Leaflets of Western Botany 5: 118. (1948) | Jacquin: Enumeratio Stirpium Pleraumque, quae sponte crescung in agro Vindobonensi 60, 235. (1762) | ||||
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