Flora of North America species comparison

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Astragalus praelongus var. ellisiae
Photo is of parent taxon

Ellis' stinking milkvetch
Flowers

15–24 mm;

calyx lobes subulate or lanceolate-attenuate, 2–5.5 mm;

corolla ochroleucous, keel often faintly to definitely maculate.
Legumes

ellipsoid, oblong-ellipsoid, or narrowly clavate-ellipsoid, 1.8–34 × (5–)6–10(–11) mm, strigulose, glabrous, or puberulent along sutures;

stipe 1–2.5 mm.
Stipules

distinct throughout.
2n

= 24.

Astragalus praelongus var. ellisiae
Phenology Flowering Apr–Jul.
Habitat Clay soils, on Cretaceous Mancos Shale and Triassic Moenkopi and Chinle formations, on alluvial substrates containing selenium, in warm and salt desert shrub and pinyon-juniper communities.
Elevation 1300–2000 m. (4300–6600 ft.)
Distribution
from FNA
CO; NM; TX; UT
[BONAP county map]
Discussion

Variation in var. praelongus, primarily of fruit shape and texture, and its interpretation by past authors, was reviewed by R. C. Barneby (1964). The broadest, almost subspheroid fruits of the more western var. praelongus appear very different from the oblong ones of the more eastern var. ellisiae, but their form is regionally clinal. Therefore, D. Isely (1998) placed the latter into var. praelongus, which is not an illogical disposition.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Preussiani > Astragalus praelongus
Sibling taxa
A. praelongus var. avonensis, A. praelongus var. lonchopus, A. praelongus var. praelongus
Synonyms Jonesiella ellisiae
Name authority (Rydberg) Barneby: Mem. New York Bot. Gard. 13: 588. (1964)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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