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Photo is of parent taxon

freckled milkvetch, glass freckled milkvetch

Photo is of parent taxon

scorpion milkvetch

Habit Plants perennial, 15–40 cm. Plants perennial, 5–30 cm.
Stems

glabrous or glabrate.

Leaves

4.5–10 cm;

leaflets (7–)13–19, blades obovate-cuneate or oblong-obovate, (5–)7–17(–21) mm, apex obtuse or truncate-emarginate.

3–10 cm;

leaflets 13–19, blades oval, obovate, or elliptic-oblanceolate, 5–15 mm, apex subacute, truncate, or retuse.

Racemes

loosely (10–)15–27-flowered, lax and open in fruit;

axis 4–8.5 cm in fruit.

8–18-flowered, short and compact in fruit;

axis 1.5–4(–5) cm in fruit.

Peduncles

4–9.5 cm.

1.5–6(–8) cm.

Flowers

13.2–17 mm;

calyx 6.5–8 mm, tube 4.6–5.7 mm, lobes (1.5–)1.7–2.3 mm;

corolla pink-purple or lavender with white wing tips.

8.5–12.2 mm;

calyx 4.2–7(–8.4) mm, tube 2.7–4.2(–5.3) mm, lobes 1.5–3.2 mm;

corolla whitish or faintly lavender.

Legumes

pale green and unmottled turning pallid, usually broadly ovoid, rarely lunately lanceoloid-acuminate, usually strongly inflated, rarely less so, 15–25 × (7–)9–15 mm, papery-membranous, subtranslucent, lustrous, glabrous;

beak triangular, short, unilocular.

green, usually mottled, becoming stramineous, broadly ovoid-acuminate, usually strongly inflated, 8–20(–25) × 4.5–12(–15) mm, stiffly papery, ± opaque, glabrous;

beak 3–10 mm, unilocular.

Seeds

21–31.

(7–)16–25.

2n

= 22.

Astragalus lentiginosus var. vitreus

Astragalus lentiginosus var. scorpionis

Phenology Flowering Apr–Jun. Flowering Jun–Aug.
Habitat Gullied badlands and desert flats, on sand or clay derived from sandstone or limestone, on volcanic gravel. Rocky crests, meadows, brushy hillsides, limber pine woodlands, mostly on limestone or limey clay soils, with sagebrush, to timberline.
Elevation 800–1500(–2000) m. (2600–4900(–6600) ft.) 2100–3400 m. (6900–11200 ft.)
Distribution
from FNA
AZ; UT
[BONAP county map]
from FNA
NV; UT
[BONAP county map]
Discussion

Variety vitreus is found in the valleys of the upper Virgin River and Kanab Creek, southward to the northern slope of the Kaibab Plateau, and Toroweap and House Rock valleys in eastern Washington and western Kane counties in Utah, and northern Mohave and northwestern Coconino counties in Arizona.

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

Variety scorpionis resembles forms of var. lentiginosus that have thin-walled, well-inflated fruits but is disjunct from that northern, lower elevation variety. Variety scorpionis is seemingly the only member of its species present in several Nevada ranges (Deep Creek, Diamond, Grant, Ruby, and White Pine). It is contiguous to two usually purple-flowered montane varieties, vars. latus and toyabensis (D. Isely 1998).

(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. wahweapensis, A. lentiginosus var. wilsonii, A. lentiginosus var. yuccanus
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. 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 Barneby: Leafl. W. Bot. 4: 119, plate 3, figs. 30–33. (1945) M. E. Jones: Rev. N.-Amer. Astragalus, 124. (1923)
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