Flora of North America species comparison

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Astragalus nuttallianus var. macilentus
Photo is of parent taxon

small milkvetch, turkeypeas
Habit Plants strigose-pilosulous, hairs to 0.8 mm.
Stems

8–30(–38) cm.
Leaves

(1.5–)2–9.5 cm;

leaflets 7–23, blades sometimes dimorphic, distal ones more narrow, linear-elliptic, oblong-oblanceolate, broadly elliptic, or obovate, apex acute or truncate-emarginate.
Racemes

(2 or)3–27-flowered;

axis to (0.5–)1–3 cm in fruit.
Peduncles

2.5–9 cm.
Flowers

calyx 3.4–5.6 mm, loosely sparsely strigulose-pilosulous, tube 2–3.1 mm, lobes 1.1–3 mm;

corolla banner (6.4–)8.5–13 mm;

keel apex obtusely rounded.
Legumes

(10–)13–25 × 1.8–2.7 mm, glabrous;

substipitate.
Seeds

12–22.

Astragalus nuttallianus var. macilentus
Phenology Flowering Mar–May.
Habitat Dry gravelly or rocky sites, disturbed soils.
Elevation 200–1400 m. (700–4600 ft.)
Distribution
from FNA
TX
[BONAP county map]
Discussion

Variety macilentus occurs from south-central Texas to the western tip of the state. Species level recognition may be justified because of its elongating inflorescences, substipitate fruits, obtuse keels, and absence of intergradation with sympatric Astragalus nuttallianus (D. Isely 1998). It is easily confused with A. emoryanus in flower, which is distinguished by its sessile and deciduous fruits.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Leptocarpi > Astragalus nuttallianus
Sibling taxa
A. nuttallianus var. austrinus, A. nuttallianus var. cedrosensis, A. nuttallianus var. imperfectus, A. nuttallianus var. micranthiformis, A. nuttallianus var. nuttallianus, A. nuttallianus var. pleianthus, A. nuttallianus var. trichocarpus, A. nuttallianus var. zapatanus
Synonyms Hamosa macilenta, A. macilentus
Name authority (Small) Barneby: Mem. New York Bot. Gard. 13: 1065. (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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