The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links
Photo is of parent taxon

yucca freckled milkvetch, yucca milkvetch

Photo is of parent taxon

lamoille canyon milkvetch

Habit Plants winter-annual or short-lived perennial, clump-forming, 15–60(–100) cm. Plants perennial, 25–48 cm.
Stems

erect and ascending.

prostrate, radiating from root-crown.

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.

6.5–12 cm;

leaflets 15 or 17, blades lanceolate to oblong-elliptic, 7–18 mm, apex truncate or round.

Racemes

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

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

12–14-flowered, floriferous from all but proximalmost nodes, short and compact in fruit;

axis 4–4.5 cm in fruit.

Peduncles

(3–)5–10 cm.

1.3–2 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.

12–15 mm;

calyx 7–7.5 mm, tube 4–4.5 mm, lobes 3–3.2 mm;

corolla whitish or faintly lavender.

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.

purple-mottled becoming stramineous, broadly ovoid-acuminate, strongly inflated, 8–12 × 5–6 mm, opaque-papery, glabrous;

beak 3–5 mm, unilocular.

Seeds

17–26.

not determined.

2n

= 22.

Astragalus lentiginosus var. yuccanus

Astragalus lentiginosus var. multiracemosus

Phenology Flowering Feb–May. Flowering Jul–Sep.
Habitat Open sandy plains, sandy or rocky washes, gulches in foothills of desert mountains, with Larrea and in yucca-grasslands. Moist seeps.
Elevation 500–1100 m. (1600–3600 ft.) 2500–2600 m. (8200–8500 ft.)
Distribution
from FNA
AZ; NV
[BONAP county map]
from FNA
NV
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.)

Variety multiracemosus is known only from Lamoille Canyon in the Ruby Mountains in Elko County. The proliferous habit of producing numerous racemes along prostrate stems is shared with disjunct vars. floribundus, ineptus, piscinensis, and sesquimetralis. The nearest relationship is most likely with var. salinus, which sometimes produces racemes from middle as well as distal nodes, producing new flowers distally while proximal racemes are in fruit. Flower size is similar to that of var. salinus; fruit is similar to that of var. scorpionis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Diphysi > Astragalus lentiginosus 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
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. 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, A. lentiginosus var. yuccanus
Name authority M. E. Jones: Contr. W. Bot. 8: 3. (1898) S. L. Welsh & N. D. Atwood in S. L. Welsh: N. Amer. Sp. Astragalus, 294, fig. 285c. (2007)
Web links