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broadleaf milkvetch, cobweb milkvetch

Habit Plants perennial, 10–35 cm.
Stems

diffuse and incurved-ascending, often red-tinged.

Leaves

(2.5–)4–11 cm;

leaflets (9 or)11–23, blades elliptic-oblanceolate, broadly oblong-oblanceolate, or obovate, (3–)5–17(–20) mm, apex obtuse or emarginate.

Racemes

(5–)10–20-flowered, flowering from middle and distally, short and compact in fruit;

axis (0.5–)1.5–4(–5.5) cm in fruit.

Peduncles

(1–)2.5–6(–7.5) cm.

Flowers

(12.5–)15–18.2 mm;

calyx (6.2–)7.5–10.5 mm, tube (4.6–)5.2–6.7 mm, lobes 1.4–3.8 mm;

corolla bright pink-purple with pale, striate eye.

Legumes

green, often red-mottled, becoming stramineous, usually strongly incurved, ovoid, lanceoloid-ovoid, or ovoid-acuminate, moderately inflated, 15–30(–40) × (7–)9–15 mm, bilocular, stiffly papery or almost leathery, usually glabrous, rarely puberulent;

beak well-defined, triangular or deltoid, 6–15 mm, unilocular.

Seeds

24–34(–38).

Astragalus lentiginosus var. chartaceus

Phenology Flowering May–Jul.
Habitat Sagebrush, pinyon-juniper, and mixed desert shrub communities, on alluvial silt, igne­ous gravel.
Elevation 1400–2200 m. (4600–7200 ft.)
Distribution
from FNA
NV; UT
[BONAP county map]
Discussion

Variety chartaceus is widespread from central to western Utah into northeastern and central Nevada, there intergrading with vars. fremontii, kennedyi, and toyabensis. S. L. Welsh (2007) discussed the problems of including this variety in an expanded var. diphysus and its complex relationships to other varieties.

(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. 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
Synonyms A. araneosus, A. lentiginosus var. araneosus
Name authority M. E. Jones: Proc. Calif. Acad. Sci., ser. 2, 5: 673. (1895)
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