Astragalus tephrodes var. chloridae
Astragalus sect. Argophylli
ashen milkvetch, chloride milkvetch
2–15 cm.
(when present) obsolete, single, few, or several to many.
10–24 cm;
leaflets 19–25, blades flat, rhombic, rhombic-ovate, obovate, or oblanceolate, 6–26 mm, apex usually acute, sometimes obtuse.
odd-pinnate, usually petiolate, rarely short-petiolate or subsessile;
leaflets (1 or)3–39(–43).
13–24-flowered;
axis (4–)7–20 cm in fruit.
subcapitate to loosely flowered, flowers erect, ascending, spreading, declined, or nodding, secund, and retrorsely imbricate.
13–40 cm.
16.8–20.4 mm;
calyx 11.5–14 mm, pilosulous or loosely strigulose, tube 8.3–10.2 mm, lobes 2.1–3.8 mm;
corolla banner 16.8–20.4 mm;
keel 15.2–18.2 mm.
purple, pink-purple, magenta-purple, violet, bluish, lilac, scarlet, ochroleucous, greenish white, or white, banner barely recurved (A. phoenix) or recurved through 20–50° (90–100° in A. accumbens), keel apex obtuse.
tubes cylindric or deeply campanulate.
lanceolate- or oblong-ellipsoid, 22–34 × 6–10(–12) mm, beak 3–6 mm, stiffly leathery or subligneous, angles ± rugulose, strigulose-pilosulous.
usually deciduous, usually sessile, rarely subsessile or substipitate, gynophore sometimes present, usually ascending (humistrate), less often spreading or pendulous, subglobose to ellipsoid, narrowly lanceoloid, ovoid or oblong-ellipsoid, or lanceoloid-ovoid, straight or usually incurved, usually compressed dorsiventrally, sometimes obcompressed, 3-sided, turgid, or inflated, unilocular, subunilocular, or bilocular.
28–36.
11–70.
2–15 mm, surfaces sparsely strigulose or glabrate abaxially.
distinct (except anomalous forms of A. missouriensis, A. tephrodes, and A. zionis).
basifixed or malpighian.
= 22.
Astragalus tephrodes var. chloridae
Astragalus sect. Argophylli
As strictly perceived, var. chloridae is restricted to the Cerbat Mountains, Mohave County, Arizona, and the Newberry Mountains, Clark County, Nevada. D. Isely (1998) allowed a somewhat broader range in Mohave County.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species 44 (44 in the flora).
Section Argophylli comprises ten subsections, widespread in western North America from southern British Columbia and Saskatchewan southward to northern Baja California, northern Sonora, and western Texas.
The subsections are: subsect. Argophylli (A. Gray) M. E. Jones (Astragalus argophyllus, A. callithrix, A. columbianus, A. cyaneus, A. desereticus, A. eurylobus, A. henrimontanensis, A. iodopetalus, A. piutensis, A. shortianus, A. tephrodes, A. tidestromii, A. uncialis, A. zionis); subsect. Pseudargophylli Barneby (A. feensis, A. waterfallii); subsect. Neomexicani Barneby (A. neomexicanus); subsect. Newberryani M. E. Jones (A. eurekensis, A. loanus, A. musiniensis, A. newberryi, A. phoenix, A. welshii); subsect. Concordi S. L. Welsh (A. concordius); subsect. Coccinei M. E. Jones (A. coccineus); subsect. Eriocarpi (A. Gray) Barneby (A. anserinus, A. funereus, A. inflexus, A. leucolobus, A. nudisiliquus, A. purshii, A. subvestitus, A. utahensis); subsect. Parryani Barneby (A. parryi); subsect. Missourienses M. E. Jones (A. accumbens, A. amphioxys, A. castaneiformis, A. chamaeleuce, A. consobrinus, A. cymboides, A. laccoliticus, A. missouriensis, A. piscator); and subsect. Anisi Barneby (A. anisus).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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