94 ORDER 43. LEGUMINOS^E. 



1 P. candidum MX. Glabrous, erect; Ifts. 79, all sessile, linear-lanceolate, ma 



cronate, glandular beneath ; spikes on long peduncles ; bracts longer than the white 

 petals. Dry prairies, S. and W. Slender. 3f. Leaflets 1'. July. 



2 P. violaceum MX. Minutely pubescent, erect ; Ifts. 5, linear, glandular beneath ; 



spikes pedunculate ; bracts shorter than the violet petals. Prairies, West. 2f. Leaf- 

 lets 1'. Heads 1' long, brilliant. July, Aug. 



3 P. earneum MX. Glabrous, erect ; Ifts. 57, lance-linear ; spikes oblong, pedun- 



culate ; bracts obovate ; pet. oblong. Ga. and Fla. Slender. 1 2f. Rose-wh. Aug. 



4 P. ffracile Nutt. Glabrous, decumbent at base ; Ifts. 7, lance-liuear ; spikes some- 



what sessile ; bracts acute ; petals ovate. Pine woods, Fla. and W. 1 2f. White. 



5 P. corymbosum MX. St. corymbously branched ; spikes capitate, sessile; bracts 



broad, colored, the outer leaf-bearing ; Ifts. linear, 5 7. South. 2f. White. Sept. 



40. ASTRAGALUS, L. MILK VETCH. Calyx 5-tootked. Pet. elon- 

 gated, erect, clawed. Vex. narrow, equalling or exceeding the obtuse keel. 

 Stam. diadelphous (9 and 1). Legume mostly turgid, 2-valved, 1-celled, or 

 2-celled partly or completely by the intrusion of the sutures. Seeds 1 oo, 

 funiculus slender. U chiefly. Leaves unequally pinnate. Flowers in 

 spikes or racemes. (Including Phaca, L.) 



Legume abruptly stipitate, oblong, straight-pubescent Nos. 1, 2 



Legume sessile in the calyx. a Fls. white or yellowish. ..(6) 



~a Fls. blue or tipped with blue. . . (c) 



b Legume straight, ovoid-oblong, smooth, dry, turgid Nos. 3, 4 



b Legume curved, oblong, woolly or veiny, dry, flattened Nos. 5, 6 



c Legume curved, crescent-shaped, 1-celled, smooth ... .No. 7 



c Legume globular, fleshy ; when dry splitting into two Nos. 8, 9 



1 A. Robbiiisii Oakes. Erect; Ifts. 511, elliptical ; cor. white, twice longer than 



the calyx ; pod puberulent, 1-celled. Rocky shores, Vt. Rare. 8 14/. Cor. white, 

 5". May, June. 



2 A. alpinus L. Diffuse; Ifts. 1321, ovate; cor. blue above, thrice longer than the 



calyx ; pod pubescent with black hairs, 2-celled. Mts. Vt. Me. Can. June, July. 



3 A. Canadensis L. Canescent, tall ; Ifts. 2131, elliptical ; bracts as long as the 



calyx ; fls. greenish ; pod 2-celled. Banks. 2 3f. Pod 6". July, August. 



4 A. Copper! Gray. Smoothish ; Ifts. 1327, elliptical ; rac. exceeding the leaves ; fls. 



white ; pod inflated, 1-celled, roundish-ovate, with a deep groove at the ventral su- 

 ture. Banks, N. Y. and W. 1 2f. June, July. (Phaca neglecta T. & G.) 



5 A. glaber MX. Erect, smoothish ; Ifts. 1523, lance-oblong or linear ; spikes loose ; 



pod smooth, flattened, 2-celled. Pine woods, S. 1 2f. Flowers greenish. July. 



6 A. villosus MX. Low, villous ; Ifts. 915, oblong-oval ; rac. ovoid, dense ; pod 3- 



angled, 1-celled, clothed with long hairs. Dry, S. 3 6'. Fls. dull yellow. Mar. Apr. 

 T A obcordatus Ell. Low, assurgent, smoothish; Ifts. 7 12 pairs, 4", oblong to 

 obovate, cordate at apex ; ped. as long as the leaves, 8-15-flowered ; pod deflexed, in- 

 curved, pointed. 111. to Ga. & 1(X. April June. (A. distortus T. & G.) 



8 A* caryocarpus Ker. Low, diffuse, whitish, downy or nearly smooth ; leaves 



stalked; Ifts. 1521, obovate; ped. longer; fls. 8 10", capitate; pod as large as a 

 grape, smoothish, eatable. 111. W. and S. May. (A. Mexicanus DC.) 



9 A. Plattensis.N. Villous, diffuse ; Ifts. 812 pairs, oblong ; stip. lanceolate ; rac. 



capitate ; pod ovoid, villous. Gravel, 111. Tenn. and W. May. 



41. TEPHROSIA, L. GOAT'S RUE. CAT-GUT. Calyx with 5, nearly 

 equal, subulate teeth. Bracteoles 0. Vex. large, orbicular. Keel obtuse, 

 cohering with the wings. Sta. diadelphous (in the following species) or 

 monadelphous. Legume linear, much compressed, many-seeded. U LYS. 

 unequally pinnate. Leaflets mucronate. Flowers white-purple. 



