Flora of North America species comparison

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Astragalus lentiginosus var. yuccanus
Photo is of parent taxon

yucca freckled milkvetch, yucca milkvetch
Habit Plants winter-annual or short-lived perennial, clump-forming, 15–60(–100) cm.
Stems

erect and ascending.
Leaves

(5–)7–16 cm;

leaflets 13–21(–25), blades broadly elliptic, oval, rhombic-obovate, or obovate, (4–)6–21 mm, apex retuse or emarginate.
Racemes

loosely (12–)15–32-flowered, lax and open in fruit;

axis early elongating, (4.5–)6–14 cm in fruit.
Peduncles

(3–)5–10 cm.
Flowers

11–15.6 mm;

calyx 6–7.5 mm, tube 4.4–5.7 mm, lobes (1.3–)1.5–2.4 mm;

corolla white or ochroleucous, concolorous, sometimes fading pale bluish, petals poorly graduated, banner slightly longer than wings, wings and keel nearly equal length.
Legumes

stramineous, plumply ovoid-acuminate or subglobose, strongly inflated, 15–25(–32) × 10–18 mm, bilocular, papery-membranous, subtranslucent, usually glabrous, rarely minutely strigulose;

beak 3–7 mm, unilocular.
Seeds

17–26.
2n

= 22.

Astragalus lentiginosus var. yuccanus
Phenology Flowering Feb–May.
Habitat Open sandy plains, sandy or rocky washes, gulches in foothills of desert mountains, with Larrea and in yucca-grasslands.
Elevation 500–1100 m. (1600–3600 ft.)
Distribution
from FNA
AZ; NV
[BONAP county map]
Discussion

Variety yuccanus occurs in west-central Arizona, barely entering Nevada in the southern tip of Clark County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Diphysi > Astragalus lentiginosus
Sibling taxa
A. lentiginosus var. albifolius, A. lentiginosus var. ambiguus, A. lentiginosus var. antonius, A. lentiginosus var. australis, A. lentiginosus var. chartaceus, A. lentiginosus var. coachellae, A. lentiginosus var. coulteri, A. lentiginosus var. diphysus, A. lentiginosus var. floribundus, A. lentiginosus var. fremontii, A. lentiginosus var. higginsii, A. lentiginosus var. idriensis, A. lentiginosus var. ineptus, A. lentiginosus var. kennedyi, A. lentiginosus var. kernensis, A. lentiginosus var. latus, A. lentiginosus var. lentiginosus, A. lentiginosus var. macrolobus, A. lentiginosus var. maricopae, A. lentiginosus var. micans, A. lentiginosus var. mokiacensis, A. lentiginosus var. multiracemosus, A. lentiginosus var. negundo, A. lentiginosus var. nigricalycis, A. lentiginosus var. oropedii, A. lentiginosus var. palans, A. lentiginosus var. piscinensis, A. lentiginosus var. platyphyllidius, A. lentiginosus var. pohlii, A. lentiginosus var. salinus, A. lentiginosus var. scorpionis, A. lentiginosus var. semotus, A. lentiginosus var. sesquimetralis, A. lentiginosus var. sierrae, A. lentiginosus var. stramineus, A. lentiginosus var. toyabensis, A. lentiginosus var. trumbullensis, A. lentiginosus var. variabilis, A. lentiginosus var. vitreus, A. lentiginosus var. wahweapensis, A. lentiginosus var. wilsonii
Name authority M. E. Jones: Contr. W. Bot. 8: 3. (1898)
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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