316 Order 46.— LEGUMINOSjE. 



Mts. Lvs. 3 to 5' long; lfls. about 1 by $', rather remoto from each other and 

 from the stem. Petiolules scarcely 2" long. Spicate rac. terminal, solitary or 

 fascicled, 3 to 4' long. Vexillum purple, emarginate. May, Jn. 



2 A. glabra Desf. Nearly glabrous, shrnbby; lfts. oblong or elliptical, dotted, 

 petiolnlate, the lowest pair close to the stem ; fis. subsessile ; cal. teeth short, the 

 2 upper obtuse, the 3 lower longer, or nearly equal, villous ; sty. hairy towards the 

 base. — Near Wilmington and Newborn, N. Car. Plant 4 to 5f high. Fls. dark 

 blue. Jl. (v. s. in herb. Curtis.) (A. Caroliniana Croom). 



3 A. herbacea "Walt. Pubescent and somewhat hoary, shrubby; lfts. 20 to 25 

 pairs, oblong, obtuse, clotted, the lowest pair close to the stem; fls. subsessile; 

 teeth of the cal. nearly equal, short; cor. whitish. — Pine woods, N. Car. to Fla. 

 Plant 2 to 4f high, grayish. Lvs. 5 to 1' long; lfts. 6 to 8" ty 3". Petiolules 

 1" long. Spikes many, clustered at top, very downy, C to 8' long. Jn., Jl. 



4 A. canescens Nutt. Suffruiicous, and canescently villous. lfts. small, numerous, 

 crowded, ovate-elliptical, subsessile, mucronate ; spikes aggregate; fls. subsessile; 

 calyx teeth equal, oval acute; vex. bright blue; leg. l-?eeded. — A beautiful 

 species, 2 to 4f high, in dry, sandy soils, Wis. to La. and P.. Mts., and is supposed 

 to prefer localities oflead ore. Lvs. 2 to 3' long; lfts. coriaceous, 16 to 24 pairs, 

 obtuse at base, 4 to 6" by 1 to 2". Spikes 2 to 3' long. JL, Aug. 



36. DA^LEA, L. (In honor of Thomas Dale, an English botanist.) 

 Calyx subequally cleft or toothed ; petals ungtiiculate, claws of the 

 wings and keel annate to the staminate tube half way up; vexillum 

 free, the limb cordate ; stamens 10, united into a cleft tube ; ovary 

 2-ovulcd ; legume inclosed in the calyx, indehiscent, 1-secded. — Mostly 

 herbaceous and glandular-punctate. Lvs. odd-pinnate. Stipels 0, stip. 

 minut e, setaceous. Spikes mostly dense. 



D. alopecuroides Willd. Glabrous and much branched; lfts. 8 to 14 pairs, 

 linear-oval, obtuse or retuse, punctate beneath ; spike pedunculate, obJong-cylin- 

 dric, terminal, silky- villous ; bracts about equaling the acuminate segments of tho 

 cal. — CD Prairies and bottoms, 111., Mo., Car. Plant about 2f high, bushy and 

 leafy and pale green. Lfts. not more than 4'' by 1", sessile, and nearly in mutual 

 coutaet. Spikes 1 to 2' long. Vexillum. white, wing3 and keel pale violet. (D. 

 Linnaji Mx. Petalostemon Ph.) 



37. PETALOSTE'ffiON, Mx. (Alluding to the union of the petals 

 and stamens.) Calyx 5-toolhcd, nearly equal ; petals 5, on filiform 

 claws, 4 of them nearly equal, alternate -with the stamens and united 

 with the staminate tube ; stamens 5, monadelphous, tube cleft; legume 

 1-seede!, indehiscent, included in the calyx. — Mostly 1[. Lvs. un- 

 equally pinnate, exstipellate. Fls. in dense, pedunculate, terminal 

 spikes or heads. 



§ PfcT.u.osTi;MoN proper. Calyx teeth short. Heads not involucrate. Bracts small (a). 



"a Bracts aiistate-pointed, longer than the calyx I'.os. 1, 2 



a Bracts obtuse or acute, not aristate, short. .". Nos. 3, 4 



§ KmxisTF.r.A, Lam. Calyx teeth very long, setaceous, plunuuis. pappus-like. lids. 



involucrate, with broad, .scale-like bracts No. 5 



1 P. candidum Mx. Glabrous, erect ; lfts. 7 to 9, all sessile, linear-lanceolate, 

 mucronate, glandular beneath; spikes on long peduncles; bracts setaceous, 

 longer than the white petals ; vex. broadly cordate, the other pets, ovate. — A fine- 

 looking plant in dry prairies, S. and W. States. St. 2 to 4f high, sparingly 

 branched, slender. Lfts. 9 to 18" by 3 to 5", terminal ono largest. Fls. small, 

 white, crowded in dense spikes which are 1 to 3' long. Jl. 



2 P. violaceum Mx. Minutely pubescent, erect, lfts. 5, linear, glandular be- 

 neath; spikes pedunculate, oblong or subglobous, shorter than the violet petals; 

 vex. cordate, the other petals oblong, obtuse at base. — A beautiful plant, of 

 similar habits with the last. St. slender, striate, subsimpte, 1£ to 2f high. Lfts, 

 about 1' by 1'', all sessile. Spikes 1 to 8, very den6e, $ to 1-J' loDg. Petals of a 

 bright violet-purple. JL, Aug. 



