Difference between revisions of "Juncus xiphioides"
Synopsis Juncorum 50. 1822.
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|name=Juncus xiphioides var. auratus | |name=Juncus xiphioides var. auratus | ||
|authority=Engelmann | |authority=Engelmann | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Juncus xiphioides var. littoralis | |name=Juncus xiphioides var. littoralis | ||
|authority=Engelmann | |authority=Engelmann | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Juncaceae;Juncus;Juncus subg. Ensifolii;Juncus xiphioides | |hierarchy=Juncaceae;Juncus;Juncus subg. Ensifolii;Juncus xiphioides | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Juncus xiphioides | name=Juncus xiphioides | ||
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|authority=E. Meyer | |authority=E. Meyer | ||
|rank=species | |rank=species | ||
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|publication year=1822 | |publication year=1822 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V22/V22_247.xml |
|genus=Juncus | |genus=Juncus | ||
|subgenus=Juncus subg. Ensifolii | |subgenus=Juncus subg. Ensifolii | ||
Revision as of 19:56, 16 December 2019
Herbs, perennial, rhizomatous, 5–9 dm. Rhizomes 2–3 mm diam. Culms erect, 2–6 mm diam. Cataphylls 0 or 1–2, straw-colored, apex narrowly acute. Leaves: basal 1–3, cauline 2–6, straw-colored; auricles absent; blade 10–40 cm x (3–)7–12 mm. Inflorescences panicles or racemes of 20–50 heads, 2–14 cm, erect or ascending branches; primary bract erect; heads 15–70-flowered, obovoid to globose, 7–11 mm diam. Flowers: tepals green to brown or reddish brown, lanceolate, 2.4–3.7 mm, nearly equal, apex acuminate; stamens 6; anthers ½1/2 to equal filament length. Capsules slightly exserted, chestnut to dark brown, 1-locular, ellipsoid, 2.4–3.8 mm, apex acuminate, not beaked. Seeds elliptic to obovate, 0.4–0.6 mm, not tailed. 2n = 40.
Phenology: Fruiting early summer–fall.
Habitat: Salt marshes, moist areas, ditches, springs, lake and stream shores
Elevation: 500–1600 m
Distribution
Ariz., Calif., Nev., N.Mex., Utah, Mexico (Baja California).
Discussion
This species and the next (Juncus ensifolius) are closely related and have been treated as members of a single species (J. xiphioides) by Engelmann. Until a study of the complete subgenus is done, I amwe are hesitant to use a varietal name (J. xiphioides var. triandrus) for the widespread western taxon J. ensifolius.
Selected References
None.