Juncus
Family: Juncaceae
Juncus image
Sue Carnahan
  • FNA
  • Gleason & Cronquist
  • Resources
Ralph E. Brooks*;Steven E. Clemants*;  in Flora of North America (vol. 22)
Herbs, perennial or rarely annual, rhizomatous or cespitose. Culms round or flattened in cross section. Cataphylls often present at culm base. Leaves: sheaths open; blade flat, channeled, ensiform or terete, sometimes septate, margins involute. Inflorescences terminal or pseudoaxillary, monochasia or dichasia, usually with monochasial branches, cymes or 1--many heads in racemes or panicles; bracteoles 2 or absent. Flowers: tepals (4--)6 in 2 whorls; stamens (2--)3--6. Capsules 1-locular or 3-locular, septicidal. Seeds many, ellipsoid to ovoid, sometimes tailed.
Vascular plants of NE US and adjacent Canada
Tep narrow, lance-subulate to lance-ovate, dry, often firm and even sharp; stamens 6 or 3, opposite the sep when only 3; ovary and fr trilocular, subtrilocular (with incomplete partitions) or unilocular; seeds several to usually numerous (in any case more than 3), commonly ellipsoid or fusiform and minutely apiculate, sometimes with each end prolonged into a slender tail that may be longer than the body; smooth (1 of our spp. scabrous) herbs with usually simple stems and a few flat or terete, basal or cauline lvs, sometimes with bladeless sheaths only, and with a terminal, compact to loosely branched cyme of few-many fls, these solitary, paired, or often in glomerules; lf-sheaths open. 200, cosmop.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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Species within checklist: Arizona - Juncaceae
Juncus acuminatus
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Juncus articulatus
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Juncus brevicaudatus
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Juncus bryoides
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Juncus bufonius
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Juncus confusus
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Juncus cooperi
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Juncus dichotomus
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Juncus drummondii
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Juncus dudleyi
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Juncus exiguus
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Juncus interior
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Juncus laccatus
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Juncus longistylis
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Juncus macrophyllus
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Juncus marginatus
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Juncus mertensianus
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Juncus mexicanus
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Juncus nevadensis
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Juncus nodosus
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Juncus saximontanus
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Juncus tenuis
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Juncus torreyi
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Juncus xiphioides
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