616 FABACEAE 
lets 15-33, the blades narrowly oblong to oval, 4-12 mm. long, obtuse or notched at the 
apex, short-stalked : peduncles about as long as the subtending leaves : racemes subglobose 
to oblong: calyx very thin ; lobes narrowly lanceolate, shorter than the oblong-campanu- 
late tube : corolla 1.5-2 cm. long: pods fleshy, 3-3.5 cm. long, long-beaked, prominently 
ridged-reticulated, pubescent. [Astragalus Tennesseensis A. Gray.] 
On hillsides, Missouri to Tennessee and Alabama. Spring. 
2. Geoprumnon Platténse (Nutt.) Rydb. Plant villous or villous-strigillose. 
Stems more or less diffusely branched at the base, the branches 1-4 dm. long, becoming 
woody : leaves 4-10 cm. long ; leaflets 13-23, the blades oblong to elliptic or cuneate, 5-15 
mm. long, acute or rounded at the apex, short-stalked : peduncles shorter than the sub- 
tending leaves: racemes few-flowered : calyx membranous ; lobes nearly subulate, shorter 
than the oblong tube: corolla about 1.5 cm. long: pods fleshy, ovoid to subglobose, 1-1.5 
em. in diameter, sharply pointed, villous. [Astragalus Plattensis Nutt. ] 
In dry soil, on prairies, Minnesota to Indiana, Alabama and Texas. Spring. 
3. Geoprumnon pachycárpum (T. & G.) Rydb. Plant nearly glabrous or thinly 
pubescent. Stems more or less spreading, 1-2 dm. long, somewhat branched above : leaves 
5-8 em. long ; leaflets 17-31, the blades oblong to cuneate, 5-14 mm. long, obtuse, some- 
times mucronulate, short-stalked : peduncles shorter than the accompanying leaves : calyx 
appressed-pubescent : corolla not seen : pods oblong-ovoid, 2-2.8 em. long, flattened on 
the back, acuminate, but glabrous. [Astragalus pachycarpus 'T. & G.] 
On prairies, Arkansas and the Indian Territory. Summer. 
4. Geoprumnon Mexicànum (A. DC.) Rydb. Plant villous-strigillose. Stems 
branched at the base, the branches stout, spreading, or decumbent, rather fleshy : leaves 
5-10 em. long ; leaflets 17-33, the blades ovate to ovate-lanceolate, rounded or notched at 
the apex, short-stalked : peduncles commonly surpassing the subtending leaf-like bracts: 
racemes 2-8 cm. long: calyx densely pubescent ; lobes triangular to triangular-lanceolate, 
much shorter than the oblong tube: corolla cream-color, bluish at the tip, fully 1.5 em. 
long: pods fleshy, subglobose, 2.5-3 cm. in diameter, glabrous, obtuse, sessile in the calyx. 
[Astragalus Mexicanus A. DC. ] 
On prairies, Illinois to Nebraska, Arkansas and Texas. Spring. 
5. Geoprumnon crassicárpum (Nutt.) Rydb. Plant strigillose. Stems more or 
less diffusely branched at the base, the branches spreading or prostrate, 1-4 dm. long : 
leaves 3-10 em. long ; leaflets 13-27, the blades elliptic, oblong or oblong-lanceolate, 8-20 
mm. long, acute or obtuse, rarely notched at the apex, short-stalked : peduncles shorter 
than the subtending leaves or longer: racemes few-flowered : calyx membranous ; lobes 
lanceolate to subulate-lanceolate, much shorter than the tube: corolla violet-purple, L5- 
cm. long: pods subglobose or oval, fleshy, 2-2.5 cm. thick, short-pointed. [ Astragalus 
crassicarpus Nutt. ] 
On prairies, Northwest Territory to Minnesota, Texas and Colorado. Spring. 
21. ASTRAGALUS L. 
Perennial or annual herbs, various in habit. Leaves alternate, the stipules various : 
leaflets many or several, the blades entire, sometimes notched. Flowers perfeet, m 
racemes. Calyx campanulate to tubular: lobes more or less unequal. Corolla variously 
colored : standard with a broad erect blade, often much longer than the other petals : 
wings about as long as the keel-petals. Stamens 10: filaments diadelphous : anthers alike. 
Ovary sessile. Ovules few or numerous. Pod ovoid to oblong, sometimes nearly didy- 
mous, leathery or woody, perfectly 2-celled, dehiscent. Seeds few or many. 
Pods copiously pubescent with spreading hairs. 1. A. Wrightii. 
Pods glabrous or essentially so. 
Corolla less than 1 em. long: pods 4-8 mm. long. 
Pods stipitate, about as broad as long. 2. 4. Brazocneit 
Pods sessile, much longer than broad. 3. A. rA annt. 
Corolla over 1 em. long: pods 12-18 mm. long. 4. A. Cor 
1. Astragalus Wrightii A. Gray. Plant villous-strigillose. Stems simple and it 
or branched at the base, the branches decumbent, 0.5-3 dm. long, commonly ir 
leaves relatively few, often approximate ; leaflets 7-11, the blades oblong or ers ad. 
elliptic, 5-15 mm. long, acute or acutish, short-stalked : peduncles surpassing the su d 
ing leaves: racemes capitate: calyx densely villous; lobes linear-subulate, ipid 
longer than the tube : corolla white to violet, 6-10 mm. long: pods leathery, oblong, à 
1l em. long, pubescent, straight, capitate. 
In dry soil, Texas. Spring. 
