Flora of North America species comparison

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Astragalus sparsiflorus var. majusculus
Photo is of parent taxon

Front Range milkvetch, tium milkvetch
Leaves

2.5–10.5 cm;

leaflets (at least distally) 9–19, blades mostly oblong-oblanceolate or oblong-obovate, 4–15 mm.
Racemes

2–10-flowered;

axis 1–4 cm in fruit.
Flowers

calyx 3.2–4.3 mm, tube 2–2.8 × 2–2.4 mm, lobes 1.2–1.7 mm;

corolla banner recurved through 45°, 6.2–8 mm.
Legumes

red- or purple-mottled, gently incurved, narrowly oblanceoloid, 11–26 × 3–5 mm, contracted distally into short, triangular, compressed beak;

septum narrow, 0.2–0.6 mm wide.
Pubescence

sparse.

Astragalus sparsiflorus var. majusculus
Phenology Flowering May–Jul.
Habitat Dry gravelly banks, open hill­sides, sandy canyon bottoms, roadcuts, natural talus, on loose granitic sand or gravel.
Elevation 1500–3000 m. (4900–9800 ft.)
Distribution
from FNA
CO
[BONAP county map]
Discussion

Variety majusculus apparently is restricted to the valley of the South Platte River from near Denver and upstream approximately 80 km. R. C. Barneby (1964) considered it the more primitive of the two varieties, having much in common with A. diaphanus and A. wetherillii.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Inflati > Astragalus sparsiflorus
Sibling taxa
A. sparsiflorus var. sparsiflorus
Name authority A. Gray: Proc. Amer. Acad. Arts 6: 206. (1864)
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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