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three-flower rush, three-hulled rush
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roundhead rush
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| Herbs, perennial, cespitose, 0.3–3.5 dm. |
Herbs, perennial, rhizomatous, sometimes to nearly cespitose, 4–10 dm. |
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not tuberous, 2 mm diam. |
1–8, 0.3–0.5 mm diam. |
erect, terete, 3–5 mm diam., smooth. |
1–2. |
0. |
basal, 2–4; auricles slightly prolonged, rounded, scarious to ± leathery; blade deeply channeled, 2–10 cm, mostly shorter than culms. |
basal 2–3(–6), cauline 1–4; auricles 1–3 mm, apex acute, membranaceous, absent on proximal leaves; blade green, laterally compressed, 9–70 cm × 2–6 mm. |
solitary heads, each with 2–3(–50) flowers; primary bracts brownish, nearly equal to or slightly shorter thanabout equaling inflorescence. |
terminal panicles of 10–30 heads, 10–30 cm, branches spreading; primary bract erect; heads 20–30-flowered, spheric, (10–)12–15 mm diam. |
tepals pale brown or darker, oblong-lanceolate, 3–5 mm, outer and inner series nearly equal; stamens 6, filaments 2.5–4 mm, anthers 0.6–1 mm; styles 0.5–0.8 mm. |
tepals green to reddish, lance-subulate, 4–5 mm, apex acuminate; stamens 3, anthers 1/3–1/2 filament length. |
tan, pseudo-3-locular, 3-gonous–cylindric, apex obtuse, mucronate. |
exserted, straw-colored, 1-locular, subulate, 4–5,5 mm, tapering to subulate tip, valves separating or not at dehiscence; fertile throughout or only proximal to middle.. |
tan or darker, fusiform, body 0.5–1 mm, tails 0.6–1 mm. |
broadly ellipsoid, 0.5–0.6 mm, not tailed; body clear yellow-brown. |
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AK; CO; ID; MT; NM; OR; UT; WY; AB; BC; MB; NT; NU; ON; QC; SK; YT; Eurasia
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AL; AR; FL; GA; KS; LA; MO; MS; NC; OK; SC; TN; TX; VA
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Varieties 3 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
1. Most proximal bracts of inflorescence obtuse to mucronate, usually much shorter than inflorescence; capsules well exserted from perianth, 4.5–7 mm, apex conic or rounded proximal to persistent style | var. triglumis |
1. Most proximal bracts of infloresecence equal to or longer than inflorescence, apex long acuminate or awned; capsules included or barely exserted from perianth, 3–5 mm, apex nearly truncate proximal to persistent style | var. albescens |
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1. Inflorescence 10–30 cm; heads 20–30-flowered; capsule fully separating at apex after dehiscence | var. validus |
1. Inflorescence 2–5 cm; heads 6–15-flowered; capsule remaining united at apex after dehiscence | var. fascinatus |
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| FNA vol. 22. |
FNA vol. 22. |
| Juncaceae > Juncus > subg. Alpini |
Juncaceae > Juncus > subg. Septati |
J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. capitatus, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. dichotomus, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. gymnocarpus, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. interior, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. trigonocarpus, J. uncialis, J. validus, J. vaseyi, J. xiphioides |
J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. capitatus, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. dichotomus, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. gymnocarpus, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. interior, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. triglumis, J. trigonocarpus, J. uncialis, J. vaseyi, J. xiphioides |
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J. crassifolius |
| Linnaeus: Sp. Pl. 1: 328. (1753) |
Coville: Bulletin of the Torrey Botanical Club 22:305. (1895) |
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OR
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