Flora of North America species comparison

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Astragalus lentiginosus var. sesquimetralis
Photo is of parent taxon

soda springs milkvetch, Sodaville milk vetch
Habit Plants perennial, to 70–80 cm.
Stems

prostrate.
Leaves

2–5 cm;

leaflets 9–15(or 17), blades oblanceolate, 6–18 mm, terminal leaflet 7–15 mm, apex obtuse or subacute.
Racemes

shortly and loosely 6–12-flowered, short and compact in fruit;

axis 1–2 cm in fruit.
Peduncles

1.5–4 cm.
Flowers

14–14.5 mm;

calyx 7–8 mm, tube 4.8–5.5 mm, lobes 2.2–2.5 mm;

corolla purple.
Legumes

mottled, ovoid or broadly lanceoloid, moderately inflated, 16–26 × 9–12 mm, semibilocular, stiffly papery, strigulose;

beak incurved, 4–8 mm, unilocular.
Seeds

12–20.

Astragalus lentiginosus var. sesquimetralis
Phenology Flowering May–Jun.
Habitat Saline, seasonally moist clay flats, around seeps and springs.
Elevation 900–1400 m. (3000–4600 ft.)
Distribution
from FNA
CA; NV
[BONAP county map]
Discussion

The branches of var. sesquimetralis radiate, forming large, round plants that hug the ground. This habit, coupled with a long season of available water, is evidently conducive to long-continuing flowering and fruiting but is not necessarily an indication of a near relationship to other taxa that are similar (see discussion under 285c. var. multiracemosus). The variety is restricted to southern Mineral County, Nevada, and northern Inyo County, California.

(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. 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 Cystium sesquimetrale
Name authority (Rydberg) Barneby: Leafl. W. Bot. 4: 116. (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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