Difference between revisions of "Allium tribracteatum"

Torrey

Pacif. Railr. Rep. 4(5): 148. 1857.

IllustratedEndemicConservation concern
Treatment appears in FNA Volume 26. Treatment on page 269. Mentioned on page 232, 268.
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|distribution=Calif.
 
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|discussion=<p>Of conservation concern.</p><!--
 
|discussion=<p>Of conservation concern.</p><!--
--><p>Allium tribracteatum is known only from the Sierra Nevada in Tuolumne County.</p>
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--><p><i>Allium tribracteatum</i> is known only from the Sierra <i>Nevada</i> in Tuolumne County.</p>
 
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name=Allium tribracteatum
 
name=Allium tribracteatum
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|authority=Torrey
 
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|publication title=Pacif. Railr. Rep.
 
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|special status=Illustrated;Endemic;Conservation concern
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V26/V26_505.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V26/V26_505.xml
 
|genus=Allium
 
|genus=Allium
 
|species=Allium tribracteatum
 
|species=Allium tribracteatum

Latest revision as of 21:15, 5 November 2020

Bulbs generally 2–5+, not clustered on stout primary rhizome, ovoid, 1–2 × 0.8–1.8 cm; outer coats enclosing 1 or more bulbs, brownish, membranous, prominently cellular-reticulate, cells irregularly arranged, ± transversely elongate, curved, without fibers; inner coats white, cells obscure, ± transversely elongate, irregularly arranged, curved. Leaves usually deciduous with scape, withering from tip at anthesis, 2, basally sheathing, sheaths not extending much above soil surface; blade solid, flat or broadly channeled, ± falcate, 12–20 cm × 1–3.5 mm, margins entire. Scape usually forming abcission layer and deciduous with leaves after seeds mature, frequently breaking at this level after pressing, solitary, erect, solid, terete, 2–7 cm × 0.5–1.5 mm. Umbel persistent, erect, compact, 10–30-flowered, hemispheric, bulbils unknown; spathe bracts persistent, (2–)3(–4), 4–5-veined, ovate, ± equal, apex abruptly acuminate to apiculate. Flowers campanulate, 6.5–8 mm; tepals erect, white to pink with dark pink or purplish midvein, lanceolate to ± elliptic, ± equal, becoming papery in fruit, margins entire, apex acute; stamens included; anthers purple; pollen gray; ovary crested; processes 3, acute, ± lateral, margins entire; style linear, shorter than stamens; stigma capitate, scarcely thickened, unlobed; pedicel 6–9 mm. Seed coat dull; cells ± smooth. 2n = 14.


Phenology: Flowering Mar–May.
Habitat: Rocky, volcanic soils
Elevation: 1300–3000 m

Discussion

Of conservation concern.

Allium tribracteatum is known only from the Sierra Nevada in Tuolumne County.

Selected References

None.

Lower Taxa

None.