Amorpha. LEGUMINOS^. 305 



Abbeville, Georgia, Elliott. May-June. — Stem 1-2 feet his;h, tliick, nearly 

 glabrous. Leaflets small, dotted. Stipules broadly ovate, sli^flitly ciliate. 

 Bracts about half as loug as the calyx. Teeth ol" the calyx very long, acute, 

 villous on the margin. Corolla violet. Legume not seen, but from the ap- 

 pearance ol the ovary 1-seeded. Elliutt. 



B. Corolla irregular^ not projKrly papilionaceous : fojocrs in spiltes or heads: 



26. AMORPHA. Linn. ; Lam. ; Gcertn. fr. t. 144 ; DC. prodr. 2. p. 256. 



Calyx obconical-campanulate, ^-toothed or 5-cleft, persistent. Vexillum 

 concave, unguiculate, erect : wings and keel wanting. Style filiform. Sta- 

 mens exserted, monadelphous at the base. Legume oblong, a little curved, or 

 lunulate, longer than the calyx, roughened or tubcrculate Avith glands, tardily 

 dehiscent, 1-2-seeded. Seeds oblong-oval, or slightly reniform. — Shrubby or 

 suffruiicose plants (all North American). Leaves unequally pinnate: leaflets 

 numerous, punctate with pellucid (at length mostly brownish) dots, usually 

 stipellate. Stipules caducous. Racemes spiked, virgate, terminal, often ag- 

 gregated or paniculate at the summit of tlie branches. Flowers much crowd- 

 ed, bluish-violet or nearly white : pedicels articulated with the flower. 



1. A. fruiicosa (Linn.) : pubescent or nearly glabrous, shrubby or arbores- 

 cent; leaflets oval or elliptical-oblong, petiolulate, the lowest pair not approxi- 

 mated to the stem ; calyx somewhat pubescent ; the teeth short, the lower 

 one acuminate and a little longest, the others commonly obtuse ; vexillum 

 purple; legume about 2-sceded. — Walt. Car. p. 179; Midi.v. ! fl. 2. p. 64; 

 Fiirsh, ji. 2. p. 467; Ell. sk. 2. p. 188; Bot. reg. t. 427; DC. l. c. ; Hook. 

 Ji. Bor.-Am. 1. p. 139. 



0. vexillum glandular on the outside. — A. glabra, Desf. ; DC. I. c. 



Along rivers, Pennsylvania to Florida ! and Louisiana! west to the Rocky 

 Mountains ! Near Lake Winnipeg, Douglas. June. — Shrub 6-10 or 16 

 feet high, sometimes arborescent : young branches and leaves pubescent. 

 Leaflets variable in size, sometimes slightly emarginate, sparsely peUucid- 

 punctate. Spikes clustered. Calyx at length more glandular; the lateral 

 teeth often acute. Vexillum deeply emarginate. Style hairy nearly the 

 whole length. 



2. A. Caroliniana (Croom) : stem and leaves nearly glabrous; leaflets 

 oblong or elliptical, petiolulate, dotted, the lowest pair approxiniated to the 

 stem ; flowers on very short pedicels ; calyx villous on the margin ; the teeth 

 short, the two upper obtuse, the three lower longer and commonly equal, 

 acuminate or subulate-aristate ; vexillum dark blue. — Croom! in Sill. pur. 

 25, (1833) p. 74. A. cynostachya, Curtis! in Bost.jour. nat. hist. 1. p. 141. 



Wilmington, N. Carolina, Curtis ! Newbern, Croom ! July.— Shrub 4-5 

 feet high. Leaflets smaller and more numerous than in A. fruticosa. Calyx 

 subsessile, glandular. Style hairy below. — Intermediate between the pie- 

 ceding species and A. herbacea; resembling the latter in the leaves and very 

 short pedicels. We find considerable diversity in the calyx-teeth, even iu 

 the same specimen. Commonly, perhaps, the 3 lower teeth are abruptly al- 

 ternate into a subulate cusp, and the 2 upper very obtuse and short; but 

 sometimes the middle one of the 3 lower teeth only is cuspidate, and again 

 they are all short and acute. This and the succeeding species require a care- 

 ful examination in the living state, or with more complete materials than we 

 at present possess. 



39 



