Flora of North America species comparison

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Astragalus lentiginosus var. variabilis
Photo is of parent taxon

freckled milk vetch, victorville freckled milkvetch
Habit Plants usually short-lived perennial, sometimes annual, (4–)10–40 cm, herbage usually cinereous, sometimes green or silky-canescent.
Stems

diffuse and ascending;

ashy canescent or green.
Leaves

(2.5–)4–13 cm;

leaflets (7–)11–21(–25), blades obovate-cuneate to broadly oblanceolate or rhombic-elliptic, 4–15(–17) mm, apex usually obtuse or emarginate, rarely acute or subacute.
Racemes

loosely (10–)12–25-flowered, lax and open in fruit;

axis (3–)4–15(–17) cm in fruit.
Peduncles

3–8(–9) cm.
Flowers

11.1–15 mm;

calyx 4.7–6.5 mm, tube 3.7–5.2 mm, lobes 1–1.4(–1.5) mm, adaxial pair usually shortest;

corolla pink- or magenta-purple.
Legumes

pale green or mottled becoming stramineous, obliquely ovoid or subglobose, bladdery-inflated, (12–)15–27(–30) × 8–14(–15) mm, bilocular, stiffly papery, opaque, sparsely strigulose to densely and canescently strigose-villosulous;

beak (3–)4–9 mm, unilocular.
Seeds

23–29.
2n

= 22.

Astragalus lentiginosus var. variabilis
Phenology Flowering (Feb–)Mar–Jun.
Habitat Sandy flats, washes, desert playas, sometimes on dunes, usually with Larrea.
Elevation 100–1000(–2100) m. (300–3300(–6900) ft.)
Distribution
from FNA
CA; NV
[BONAP county map]
Discussion

Variety variabilis is common and locally abundant in the southern and southwestern Mojave Desert, replacing var. fremontii, which is usually found to the north and east. Vestiture varies from ashy white to greenish. To the north in southern Inyo County, California, it intergrades with var. fremontii to the point that differentiation of the varieties is subjective. At low elevations in the central Mojave Desert it grades into var. coachellae. It also occurs on the floor of the upper San Joaquin Valley in Kern County, California, where it closely resembles var. nigricalycis except for the purple flowers. White-canescent plants of this variety also occur in Nye County in Nevada, west of Beatty. R. C. Barneby (1964) discussed intergradient populations more thoroughly.

(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. stramineus, A. lentiginosus var. toyabensis, A. lentiginosus var. trumbullensis, A. lentiginosus var. vitreus, A. lentiginosus var. wahweapensis, A. lentiginosus var. wilsonii, A. lentiginosus var. yuccanus
Name authority Barneby: Leafl. W. Bot. 4: 123, plate 4, figs. 1–8. (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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