Juncus hemiendytus |
Juncus arcticus |
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blood rush, dwarf rush, Herman's dwarf rush, Hermann's dwarf rush, juncus hemiendytus |
arctic rush |
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Habit | Herbs, annual, cespitose, 0.03–0.36 dm. | Herbs, perennial, 2–10 dm. | ||||||||||||
Rhizomes | long- creeping. |
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Culms | to 5. |
erect, 1–3 mm diam. |
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Cataphylls | several. |
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Leaves | to 1.8 cm, 1/2–1 1/3 height of plant. |
blade usually absent (present in var. mexicanus). |
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Inflorescences | solitary flowers. |
lateral, 3–many-flowered, loose to congested; primary bract barely exceeding to many times longer than 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. |
variously pedicellate; bracteoles membranous; tepals chestnut brown or paler, lanceolate, (2.5–)3.3–5.5(–6) mm, margins clear; inner series loosely subtending capsule at maturity; usually slightly shorter, margins scarious to clear, apex acutish to obtuse; stamens 6, filaments 0.2–1.1 mm, anthers 0.9–2.2 mm; style 0.9–1.5 mm. |
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Capsules | reddish, 2–- or 3-locular, obovoid to ellipsoid or oblate, 1.9–3.5 × 1–2 mm. |
3-locular or infrequently pseudo-3-locular, oblate to narrowly ovoid, 3.5–4(–4.5) mm, equal to or exceeding perianth. |
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Seeds | ovoid to oblate, 0.3–0.55 mm. |
dark amber, oblate to ellipsoid, 0.6–0.8 mm. |
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Juncus hemiendytus |
Juncus arcticus |
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Distribution |
AK; AR; AZ; CA; CO; DE; IA; ID; IL; IN; KS; MA; MD; ME; MI; MN; MO; MT; ND; NE; NH; NM; NV; NY; OH; OK; OR; PA; SD; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NS; NT; NU; ON; PE; QC; SK; YT; Mexico; South America; Asia
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Numerous entities have been circumscribed and recognized at various nomenclatural ranks by a plethora of authors addressing state or regional floras. In considering the Juncus arcticus-balticus complex as a whole in North America, one is soon confronted with a wide-ranging and obviously polymorphic complex that has not read the literature. It is abundantly clear that the systematics of the group will not be solved on the basis of morphology alone and that resolution of the problem is ripe for molecular investigations. Varieties 3 7 (3 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. Genuini | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | J. brachystylus, J. brachystylus var. uniflorus, J. triformis var. uniflorus | |||||||||||||
Name authority | F. J. Hermann: Leaflets of Western Botany 5: 118. (1948) | Willdenow: Sp. Pl. 2: 206. (1799) | ||||||||||||
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