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Photo is of parent taxon

freckled milkvetch, glass freckled milkvetch

Photo is of parent taxon

freckled milkvetch, southern freckled milkvetch

Habit Plants perennial, 15–40 cm. Plants perennial (short-lived), clump-forming, 25–40(–60) cm.
Stems

glabrous or glabrate.

decumbent and ascending.

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.

(5–)6–17 cm;

leaflets (13 or)15–21(or 23), blades usually obovate, broadly elliptic, or rhombic-ovate, rarely suborbiculate, (4–)6–25 mm, apex emarginate or retuse.

Racemes

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

axis 4–8.5 cm in fruit.

loosely (10–)15–33-flowered, lax and open in fruit;

axis (3.5–)4–12 cm in fruit.

Peduncles

4–9.5 cm.

3–7(–9) 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.

(13.2–)14.5–18 mm;

calyx (5.3–)6.4–10.8 mm, tube (4.5–)4.8–7 mm, lobes (0.8–)1.6–3.8 mm;

corolla pink-purple, sometimes pale.

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 or faintly mottled becoming stramineous or purplish, narrowly to broadly ovoid-acuminate or broadly lanceoloid-acuminate, slightly or greatly inflated, 12–22 × (4–)5–13(–15) mm, bilocular, thinly papery, usually glabrous, rarely sparsely pubescent;

beak 4–8 mm, unilocular.

Seeds

21–31.

18–22.

2n

= 22.

= 22.

Astragalus lentiginosus var. vitreus

Astragalus lentiginosus var. australis

Phenology Flowering Apr–Jun. Flowering Feb–May.
Habitat Gullied badlands and desert flats, on sand or clay derived from sandstone or limestone, on volcanic gravel. Open desert, sandy playas and outwash fans, plains, washes in foothills of desert mountains, with Larrea, Carnegiea gigantea, in yucca-grasslands.
Elevation 800–1500(–2000) m. (2600–4900(–6600) ft.) 600–1300 m. (2000–4300 ft.)
Distribution
from FNA
AZ; UT
[BONAP county map]
from FNA
AZ; NM; TX; Mexico (Chihuahua, Sonora)
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 australis is common and abundant in southeastern Arizona and southwestern New Mexico, grading into var. yuccanus to the north in Arizona. Eastward it extends to far western trans-Pecos Texas and becomes similar to var. diphysus.

(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. 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. yuccanus
Name authority Barneby: Leafl. W. Bot. 4: 119, plate 3, figs. 30–33. (1945) Barneby: Leafl. W. Bot. 4: 117, plate 3, figs. 15–19. (1945)
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