Flora of North America species comparison

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Astragalus lentiginosus var. coulteri
Photo is of parent taxon

Borrego Springs milkvetch
Habit Plants winter-annual, 10–30 cm, herbage densely pubescent).
Leaves

6–10(–16) cm;

leaflets (7–)15–19, blades broadly obovate-cuneate to elliptic-oblanceolate, 4–14(–21) mm, apex obtuse or emarginate to retuse.
Racemes

loosely 13–35(–48)-flowered;

axis (4.5–)6–18(–26) cm in fruit.
Peduncles

5–10 cm.
Flowers

12–14.8 mm;

calyx 5.2–6.6 mm, tube 4–5.1 mm, lobes 1–2.3 mm;

corolla pink-purple.
Legumes

greenish stramineous, sometimes faintly mottled, lanceoloid to ovoid-acuminate, not or scarcely inflated, slightly turgid, 15–23 × 4.5–6 mm, ± bilocular, thin becoming papery, silky-strigulose-villosulous;

beak short, unilocular.
Seeds

(10–)13–20.

Astragalus lentiginosus var. coulteri
Phenology Flowering late Feb–May.
Habitat Sandy flats and semi­stabilized dunes, with Larrea.
Elevation 30–900 m. (100–3000 ft.)
Distribution
from FNA
AZ; CA; Mexico (Sonora)
Discussion

Variety coulteri is found in the southern Colorado Desert, extending from eastern San Diego County in California, to the Yuma Desert in extreme southwestern Yuma County in Arizona, and adjacent Sonora, Mexico.

(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. 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. coulteri, A. agninus, A. arthurschottii, A. lentiginosus var. borreganus
Name authority (Bentham) M. E. Jones: Contr. W. Bot. 8: 4. (1898)
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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