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toyabe milkvetch

Habit Plants perennial, 10–30 cm.
Stems

usually ascending, rarely prostrate.

Leaves

3–13(–16) cm;

leaflets (7–)15–25, blades oval-obovate, broadly oblanceolate, or narrowly elliptic-oblanceolate, (2–)6–16(–21)mm, apex obtuse and apiculate, truncate, acute, or subacute.

Racemes

7–18-flowered, short and compact in fruit;

axis 1–2.5(–5) cm in fruit.

Peduncles

1.5–4.5(–6.5) cm.

Flowers

12.6–17 mm;

calyx (6.2–)6.7–10 mm, tube 5–6.5 mm, lobes (1.2–)1.6–3.5(–4) mm;

corolla usually pink-purple, rarely whitish.

Legumes

usually mottled becoming stramineous, narrowly to broadly ovoid-acuminate, ± strongly inflated, 8–20 × 4–11 mm, thinly papery, glabrous or exceptionally puberulent;

beak triangular-acuminate, (3–)4–11 mm, unilocular.

Seeds

13–20.

Astragalus lentiginosus var. toyabensis

Phenology Flowering Jun–Aug.
Habitat Dry, stony hillsides with sagebrush, open, treeless crests within timber belt, rarely above timber belt, on cool, loamy soils among aspens, on igneous bedrock.
Elevation (1800–)2400–3500 m. ((5900–)7900–11500 ft.)
Distribution
from FNA
NV
Discussion

Usually a montane plant of central and west-central Nevada, var. toyabensis sometimes descends into the foothills as low as 1830 m, where it enters the habitat of, and apparently grades into, var. chartaceus, a form that differs typically in its leathery or at least much more stiffly papery fruit (R. C. Barneby 1964).

(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. 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: 106, plate 3, figs. 1–4. (1945)
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