familyFabaceae
subfamilyFabaceae subfam. Faboideae
genusAstragalus
sectionAstragalus sect. Ervoidei
speciesAstragalus vexilliflexus
varietyAstragalus vexilliflexus var. nubilus

Astragalus vexilliflexus var. nubilus

Barneby

Amer. Midl. Naturalist 55: 484. 1956.

Stanley L. Welsh
Common names: Cloud Range milkvetch
EndemicConservation concern
Treatment appears in FNA Volume 11.

Plants densely matted. Stems prostrate. Leaflets: blade sur­faces silky-strigulose or villos­ulous adaxially. Corollas whit­ish, keel maculate, banner faintly purple-veined; banner 5.2–6.2 mm. Legumes sub­symmetrically lenticular, 3.5–5 mm.


Phenology: Flowering Aug–Sep.
Habitat: Stony ridgecrests above timber­line.
Elevation: 3000–3400 m.

Distribution

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Idaho.

Discussion

The ashy canescence results in the grayish hue to the tufts or mats of var. nubilus, which is endemic to Custer and Valley counties. D. Isely (1998) questioned whether this variety is any more significant than other local phases.

Selected References

None.

Lower Taxa

None.
... more about "Astragalus vexilliflexus var. nubilus"
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Author
Stanley L. Welsh +
Authority
Barneby +
Basionyms
Astragalus pauciflorus +
Common name
Cloud Range milkvetch +
Distribution
Idaho. +
Elevation
3000–3400 m. +
Habitat
Stony ridgecrests above timberline. +
Number of lower taxa
0 +
Phenology
Flowering Aug–Sep. +
Publication title
Amer. Midl. Naturalist +
Publication year
1956 +
Reference
None +
Source xml
https://bitbucket.org/aafc-mbb/fna-data-curation/src/master/coarse grained fna xml/V11/V11 1382.xml +
Special status
Endemic +  and Conservation concern +
Synonyms
Papilionoideae de +
Taxon family
Fabaceae +
Taxon name
Astragalus vexilliflexus var. nubilus +
Taxon parent
Astragalus vexilliflexus +
Taxon rank
variety +
Volume
Volume 11 +