Difference between revisions of "Juncus castaneus"
Fl. Brit. 1: 383. 1800.
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|name=Juncus castaneus var. pallidus | |name=Juncus castaneus var. pallidus | ||
|authority=(Hooker ex Buchenau) B. Boivin | |authority=(Hooker ex Buchenau) B. Boivin | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Juncus castaneus subsp. leucochlamys | |name=Juncus castaneus subsp. leucochlamys | ||
|authority=(N. W. Zinger. ex V. I. Kreczetowicz) Hultén | |authority=(N. W. Zinger. ex V. I. Kreczetowicz) Hultén | ||
| + | |rank=subspecies | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Juncus leucochlamys | |name=Juncus leucochlamys | ||
| − | |authority= | + | |authority= |
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Juncaceae;Juncus;Juncus subg. Alpini;Juncus castaneus | |hierarchy=Juncaceae;Juncus;Juncus subg. Alpini;Juncus castaneus | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Juncus castaneus | name=Juncus castaneus | ||
| − | |||
|authority=Smith | |authority=Smith | ||
|rank=species | |rank=species | ||
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|publication year=1800 | |publication year=1800 | ||
|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_451.xml |
|genus=Juncus | |genus=Juncus | ||
|subgenus=Juncus subg. Alpini | |subgenus=Juncus subg. Alpini | ||
Revision as of 19:58, 16 December 2019
Herbs, perennial, strongly rhizomatous, 1–4 dm. Culms solitary, 1–2 mm diam. Cataphylls 1–2. Leaves partially cauline, 3–5, auricles absent distally, rounded proximally; blade channeled, to 20 cm, reduced distally. Inflorescences glomerules, 1–3(–5), each with 2–10 flowers; peduncles 0.4–1.5 cm; primary bracts somewhat inflated, usually surpassing inflorescence. Flowers: bracteoles absent; tepals brown or occasionally paler, lanceolate, 4.5–6.6 mm, apex acute to obtuse; inner series slightly shorter; stamens 6, filaments 2.5–3.5 mm, anthers 0.6–1.3 mm; style 1–1.3 mm. Capsules chestnut brown, 3-locular, narrowly oblong, 6.5–8.5 × 1.8–2.3 mm. Seeds pale yellow, fusiform, body 0.6–0.7 mm, tails 0.8–1.1 mm. 2n = 60, 90, 120.
Phenology: Flowering and fruiting late spring–summer.
Habitat: Tundra, subalpine and alpine bogs and meadows, and along streams in gravelly or clayey soils
Elevation: 10–3700 m
Distribution
Greenland, Alta., B.C., Man., Nfld. and Labr. (Labr.), N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Colo., Mont., Nev., N.Mex., Utah, Wyo., Europe, Asia.
Discussion
In southern Alaska some plants with several many-flowered heads and capsules about double the length of the perianth have been referred to the Asian Juncus castaneus subsp. leucochlamys. The distinction, however, seems dubious without further investigation.
Selected References
None.