Difference between revisions of "Juncus dubius"

Engelmann

Trans. Acad. Sci. St. Louis 2:459. 1868.

Endemic
Synonyms: Juncus rugulosus Engelmann
Treatment appears in FNA Volume 22.
FNA>Volume Importer
 
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|title=Trans. Acad. Sci. St. Louis
 
|place=2:459. 1868
 
|place=2:459. 1868
 
|year=1868
 
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|name=Juncus rugulosus
 
|name=Juncus rugulosus
 
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|hierarchy=Juncaceae;Juncus;Juncus subg. Septati;Juncus dubius
 
|hierarchy=Juncaceae;Juncus;Juncus subg. Septati;Juncus dubius
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|elevation=100–1600 m
 
|elevation=100–1600 m
 
|distribution=Calif.
 
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|discussion=<p>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.</p>
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|discussion=<p><i>Juncus dubius</i> 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.</p>
 
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name=Juncus dubius
 
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|distribution=Calif.
 
|distribution=Calif.
 
|reference=None
 
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|publication title=Trans. Acad. Sci. St. Louis
 
|publication year=1868
 
|publication year=1868
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|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V22/V22_79.xml
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|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

Latest revision as of 13:06, 14 March 2024

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.

Lower Taxa

None.