ORDER 43. LEGUMINOSvE 



8 P. florlbunda N. Cauescent; Ifts. 3, rarely 5, dotted, oblong to linear ; rac. slen- 



der; ped. as long as the flowers (3") ; pod smooth. 111. and W. 3f. June. 



9 P. argophylla Ph. Erect, silky-white ; Ifts. elliptic, obtuse, 5, rarely 3 ; ped. much 



longer than the leaves ; Us. whorled. Wis. to Dakota (Matthews.) 



10 P. subacaulis T. & G. Nearly stemlcss, hirsute; Ivs. 7-foliate on very long 

 petioles ; Ifts. obovate-oblong ; ped. long, rigid ; cal. teeth obtuse. Tenn. April. 



11 P. esculenta Ph. Erect, rigid, difl'use, white-haired ; Ifts. 5, oblanceolate ; peti- 

 oles long, ped. longer (30 ; head oblong; sep. and bracts long, pointed. Minn, to Da- 

 kota (Matthews, Colman.) If. Tubers farinaceous. 



36. SESBANIA, Pers. Calyx bell-shaped. Vex. spreading or re- 

 flexed. Keel incurved, with long claws. Leg. linear or oblong, oo- or 

 few-seeded. Seeds transverse. Lvs. abruptly pinnate, with many leaflets. 

 Raceme axillary, loose (yellowish). Fig. 356. 



1 S. macrocarpa Muhl. Tall, glabrous ; Ifts. oblong-linear, 2030 ; pod linear, 



long, jointed, many-seeded. Damp, S. 3 9f. Pods If. Aug. Oct. 



2 S. platycarpa Pers. Tall, glabrous; Ifts. as above; pod oblong-elliptic, valves 



double, the inner membranous, 2-seeded. S. lOf. Aug. (Glottidium Flor. DC.) 



37. AMORPHA, L. LEAD PLANT. Calyx 5-cleft. Vex. concave, 

 unguiculate, erect. Wings and keel none. Stam. exserted. Leg. oblong, 

 somewhat curved at the point, scabrous with glandular points, 1 or 2- 

 seeded. 5 *> American. Lvs. unequally pinnate, punctate. Fls. bluish- 

 white, small, in virgate racemes. 



* Leaves stalked (lowest leaflets remote from base). Legume 2-seeded No. 1 



* Leaves sessile or nearly so. Lfts. 1620 pairs. Legume 1-seeded Nos. 2, 3 



1 A. frutlcosa L. Scarcely pubescent ; Ifts. 919, oval, obtuse (I'); cal. teeth short, 



obtuse, the lowest pointed. W. and S. to Rocky Mts. 6 16f. May, June. 



2 A. lierbacea Walt. Pubescent or not ; Ifts. 41 51, oblong, obtuse (7"); cal. teeth 



subequal, villous, upper obtuse, lower acute. South. 2 4f. June, July. 



3 A. canescens N. Villous-canescent ; Ifts. small (4"), crowded, ovate-oblong; vex. 



bright blue ; calyx teeth equal, acute. Wis. to Ga. and W. 2 4f. July, Aug. 



38. DALEA, L. Calyx subequally cleft or toothed. Pet. unguiculate, 



claws of the w T ings and keel adnate to the staminate tube half way up. 



Vex. free, the limb cordate. Sta. 10, united into a cleft tube. Ov. 2-ovuled. 



Pod enclosed in the calyx, indehiscent, 1-seeded. Glandular-punctate. 



Lvs. odd-pinnate. Stipels 0. Stip. minute, setaceous. Spikes mostly dense. 



D. alopecuroides Willd. Glabrous and much branched; Ifts. 814 pairs, linear- 

 oval, obtuse or retuse, punctate beneath ; spike pedunculate, oblong-cylindric, silky- 

 villous. (I) HI. to Ala. and W. 2f. Flowers white and violet. August. 



39. PETALOSTEMON, MX. Calyx 5-toothed, nearly equal. Pet. 5, 

 on filiform claws, 4 of them nearly equal, alternate with the stamens and 

 mited with the starninfete tube. Stam. 5, monadelphous, tube cleft Leg. 

 l-;cded, indehiscent, included in the calyx, u Leaves unequally pinnate, 

 exstipellate. Flowers in dense, pedunculate, oblong spikes or heads. 



KUHNISTEKA Lam. Heads corymbed, each with an involucre of scales ; calyx teeth 

 long, plumous, pappus-like, setaceous No. 5 



| PETALOSTEMON proper. Spikes solitary, not involucrate. Calyx teeth short. . . (a) 



a Bracts awn-pointed, longer than the calyx. West Nos. 1, 9 



a Bracts not awned, short, acute or obtuse. South Nos. 3,4 



