|
dubius rush, mariposa rush, questionable rush
|
needlepod rush, scirpuslike rush
|
| Herbs, perennial, rhizomatous, 3–7.5 dm. |
Herbs, perennial, rhizomatous, tosometimes nearly cespitose, 0.8–7 dm. |
2–3 mm diam., not swollen. |
usually tuberous, 2–4 mm diam. |
erect, terete, 2–4 mm diam., smooth or rugulose. |
erect, terete, 1–3 mm diam., smooth. |
1–2, pink to straw-colored, apex acute. |
0–1. |
basal 1–2, cauline 1–2; auricles 1–4.9 mm, , apex rounded, membranaceous; blade green to straw-colored, terete, 20–30 cm × 1.5–4 mm, rugulose or smooth. |
basal 1–2, cauline 2–3, green; auricles 1–2 mm, apex rounded, membranaceous; blade terete, 2–23 cm × 1–2 mm, distal cauline leaf blade 1.6–26 cm, equaling or longer than sheath. |
terminal panicles of 25–66 heads, 7–13 cm, branches spreading; primary bract erect; heads 6–10-flowered, hemispheric to obovoid, 5–10 mm diam. |
terminal panicles of 1–23(–32) heads, 2.5–9 cm, branches ascending to erect; primary bracts erect; heads 20–60-flowered, spheric or usually lobed, 6–11 mm diam. |
tepals straw-colored to brown, lanceolate, apex acuminate; outer tepals (2–)2.5–3.4 mm; inner tepals (2–)2.6–3.6 mm; stamens 6, anthers 1.5–2 times filament length. |
tepals green to straw-colored, lance-subulate, 2–3.5 mm, nearly equal, apex acuminate; stamens 3, anthers 1/3 filament length. |
exserted, chestnut brown, 1-locular, subuloidsubulate, (2.4–)3–3.9 mm, apex tapering to subulate tip, valves separating at dehiscence. |
exserted, straw-colored, 1-locular, lance-subulate, 3–4 mm, apex tapering, remaining attached at tip, valves not separating at dehiscence, fertile throughout or only proximal to middle. |
obovoid, 0.3–0.4 mm, not tailed. |
oblong, 0.4 mm, not tailed; body clear yellow-brown. |
= 40. |
|
|
|
|
|
| Fruiting early summer–late fall. |
Fruiting early summer–fall. |
| Montane meadows, riverbeds, canyons, aroyos |
Wet sandy soil, salt marshes, lake shores, ditches, meadows, wet woods |
| 100–1600 m (300–5200 ft) |
0–1400 m (0–4600 ft) |
|
CA
|
AL; AR; DC; DE; FL; GA; IL; IN; KS; KY; LA; MD; MI; MO; MS; NC; NE; NJ; NY; OK; PA; SC; TN; TX; WV; Va
|
Juncus dubius has rugulose stems and leaves throughout most of its range, but on the periphery (in Mariposa, San Diego, and Sonoma counties, California) the plants are smooth. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
| FNA vol. 22. |
FNA vol. 22. |
| Juncaceae > Juncus > subg. Septati |
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. 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. 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. 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. validus, J. vaseyi, J. xiphioides |
| J. rugulosus |
J. echinatus, J. scirpoides var. compositus, J. scirpoides var. genuinus, J. scirpoides var. macrostemon, J. scirpoides var. meridionalis |
| Engelmann |
Lamarck: in J. Lamarck et al., Encycl. 3: 267. (1789) |
| |
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