Difference between revisions of "Juncus dubius"
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| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
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|name=Juncus rugulosus | |name=Juncus rugulosus | ||
|authority=Engelmann | |authority=Engelmann | ||
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}} | }} | ||
|hierarchy=Juncaceae;Juncus;Juncus subg. Septati;Juncus dubius | |hierarchy=Juncaceae;Juncus;Juncus subg. Septati;Juncus dubius | ||
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name=Juncus dubius | name=Juncus dubius | ||
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|authority=Engelmann | |authority=Engelmann | ||
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|publication year=1868 | |publication year=1868 | ||
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| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V22/V22_79.xml |
|genus=Juncus | |genus=Juncus | ||
|subgenus=Juncus subg. Septati | |subgenus=Juncus subg. Septati | ||
Revision as of 21:32, 5 November 2020
Herbs, perennial, rhizomatous, 3–7.5 dm. Rhizomes 2–3 mm diam., not swollen. Culms erect, terete, 2–4 mm diam., smooth or rugulose. Cataphylls 1–2, pink to straw-colored, apex acute. Leaves: 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. Inflorescences 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. Flowers: 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. Capsules exserted, chestnut brown, 1-locular, subuloidsubulate, (2.4–)3–3.9 mm, apex tapering to subulate tip, valves separating at dehiscence. Seeds obovoid, 0.3–0.4 mm, not tailed. 2n = 40.
Phenology: Fruiting early summer–late fall.
Habitat: Montane meadows, riverbeds, canyons, aroyos
Elevation: 100–1600 m
Discussion
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.
Selected References
None.