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transparent milkvetch

Habit Plants annual, rarely biennial, caulescent, strigillose to glabrate, hairs basifixed.
Stems

few–several, decumbent to ascending, 4–30(37) cm.

Leaves

2–6 cm;

leaflets (5)7–13, oblong-obovate, oblong-ovate or obovate-cuneate, 2–12 × 2–6 mm;

tips obtuse, truncate or retuse;

surfaces abaxially strigose, adaxially glabrous;

stipules 1.5–4 mm; free.

Inflorescences

racemes loosely (3)7–15-flowered;

peduncles 1–4(5.5) cm;

bracts 0.8–1.8 mm;

pedicels 0.6–1.8;

bracteoles 0.

Flowers

declined at anthesis;

calyces 3.5–4.5 mm, strigillose with all black or black and white hairs;

tubes 2–2.6 mm;

teeth lance-subulate, 1.3–1.9 mm;

corollas 6.7–9.1 mm; whitish with lavender veins on banner;

keels purple-tipped;

ovules 6–14.

Fruits

unilocular or semibilocular, deflexed or declined; bladdery inflated or not, minutely strigillose;

valves papery-membranous;

stipes 0.

Astragalus pauperculus

Astragalus diaphanus

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

2 varieties.

Source Flora of Oregon, volume 2, page 663
Richard Halse
Sibling taxa
A. accidens, A. agrestis, A. alpinus, A. alvordensis, A. applegatei, A. arthuri, A. atratus, A. australis, A. beckwithii, A. californicus, A. calycosus, A. canadensis, A. caricinus, A. collinus, A. conjunctus, A. curvicarpus, A. cusickii, A. diaphanus, A. drummondii, A. eremiticus, A. filipes, A. gambellianus, A. geyeri, A. hoodianus, A. howellii, A. inflexus, A. iodanthus, A. kentrophyta, A. lemmonii, A. lentiginosus, A. malacus, A. misellus, A. mulfordiae, A. multiflorus, A. newberryi, A. nudisiliquus, A. obscurus, A. peckii, A. platytropis, A. purshii, A. reventus, A. robbinsii, A. salmonis, A. sclerocarpus, A. sheldonii, A. solitarius, A. spaldingii, A. sterilis, A. succumbens, A. tegetarioides, A. tetrapterus, A. toanus, A. tweedyi, A. tyghensis, A. umbraticus, A. vallaris, A. whitneyi
A. accidens, A. agrestis, A. alpinus, A. alvordensis, A. applegatei, A. arthuri, A. atratus, A. australis, A. beckwithii, A. californicus, A. calycosus, A. canadensis, A. caricinus, A. collinus, A. conjunctus, A. curvicarpus, A. cusickii, A. drummondii, A. eremiticus, A. filipes, A. gambellianus, A. geyeri, A. hoodianus, A. howellii, A. inflexus, A. iodanthus, A. kentrophyta, A. lemmonii, A. lentiginosus, A. malacus, A. misellus, A. mulfordiae, A. multiflorus, A. newberryi, A. nudisiliquus, A. obscurus, A. peckii, A. platytropis, A. purshii, A. reventus, A. robbinsii, A. salmonis, A. sclerocarpus, A. sheldonii, A. solitarius, A. spaldingii, A. sterilis, A. succumbens, A. tegetarioides, A. tetrapterus, A. toanus, A. tweedyi, A. tyghensis, A. umbraticus, A. vallaris, A. whitneyi
Subordinate taxa
A. diaphanus var. diaphanus, A. diaphanus var. diurnus
Web links