Flora of North America species comparison

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Astragalus lentiginosus var. stramineus
Photo is of parent taxon

freckled milkvetch, straw milkvetch
Habit Plants perennial (short-lived), 12–40(–65) cm, herbage cinereous or green.
Stems

ashy canescent or green.
Leaves

(2.5–)4–11(–13) cm;

leaflets (9 or)11–15, blades broadly oblanceolate or obovate-cuneate, (3–)5–18 mm, apex openly notched.
Racemes

loosely or remotely 15–25(–30)-flowered, lax and open in fruit;

axis 5–18 cm in fruit.
Peduncles

3.5–9 cm.
Flowers

11–12 mm;

calyx 5–6.6 mm, tube 3.8–4.5 mm, lobes 1.2–2.1 mm;

corolla pale purple.
Legumes

greenish, usually mottled, becoming stramineous, obliquely ovoid-acuminate, bladdery-inflated, (10–)17–26 × 10–16 mm, bilocular, somewhat stiffly papery, opaque, strigulose;

beak (2–)3–7 mm, unilocular.
Seeds

20–26.

Astragalus lentiginosus var. stramineus
Phenology Flowering Apr–May.
Habitat Mixed warm-desert shrub communities.
Elevation 900–1000 m. (3000–3300 ft.)
Distribution
from FNA
AZ; NV; UT
[BONAP county map]
Discussion

Variety stramineus is the only member of the species with moderate-sized, pale purple flowers known to occur in Washington County in Utah, and adjacent Arizona and Nevada; it is similar to the slightly smaller-flowered var. fremontii and to var. ambiguus.

(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. 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 Cystium stramineum
Name authority (Rydberg) Barneby: Leafl. W. Bot. 4: 122. (1945)
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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