258 CAESALPINACEAE. [Vor. II. 
2. Cassia Chamaecrista L. Partridge Pea. Large-flowered Sensitive Pea. 
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3. Cassia Tora IL. Low Senna. 
(Fig. 2036.) 
Cassia Tora J,. Sp. Pl. 376. 1753. 
Cassia obtustfolia I. Sp. Pl. 377. 1753. 
Annual, glabrous, 114°-2° high, branched or sim- 
ple. Stipules linear-subulate, at length deciduous; 
(Fig. 2035.) 
Cassia Chamaecrista ,. Sp. Pl. 379. 1753. 
C. fasciculata Michx. FI. Bor. ER I: ee 1803. 
Annual, erect or spreading, widely branched, 
pubescent or nearly glabrous, 1°-214° high. 
Stipules subulate-linear, persistent; leaves pe- 
tioled, with a sessile gland on the petiole, sen- 
sitive; flowers 2-4 together in the axils, 1/-1 4’ 
ff} Q} broad, slender-pedicelled, showy, some of the 
Ve 
petals often purple spotted; leaflets 20-30, lin- 
== ear-oblong or the upper lanceolate, obtuse, mu- 
cronate, inequilateral, oblique at the base, 4//— 
10’’ long, 114’/-2’’ wide; calyx-lobes long-acu- 
minate; stamens 10, all perfect; pod linear, pu- 
bescent or glabrate, 1 '4’—214 long, 2’/-3’’ wide. 
In dry soil, range nearly, the same as that of the 
preceding species, but extending somewhat far- 
ther west and to Uruguay and Bolivia. July-Sept. 
Cassia Chamaecrista robusta Pollard, Mem. Torr. 
Club, 21: 218. 1894. 
Taller, stems stouter, densely pubescent; flow- 
ers larger. Kentucky to Alabama and Mississippi. 
leaves petioled, the gland borne between or above 
the lowest pair of leaflets; leaflets 2-4 pairs, thin, 
obovate, obtuse and mucronulate at the apex, nar- 
rowed or rounded at the base, 1/-114’ long, often 1’ 
wide; flowers 6//-12/’ broad, few, in short axillary 
racemes; calyx-lobes oblong, obtuse; stamens 10, 
the anthers of the upper 3 imperfect; pod linear, 
very slender, strongly curved, 4/-6’ long, about 
1%4/’ wide. 
Along rivers, southern Pennsylvania to Indiana and 
Missouri, south to Florida and Mexico, and throughout 
tropical America and the warmer parts of the Old 
World. July-Oct. 
4. Cassia Marylandica L. Wild or 
American Senna. (Fig. 2037.) 
, Cassia Marylandica I,. Sp. Pl. 378. 1753. 
Perennial, glabrous or pubescent with a few scat- 
tered hairs, 3°-8° high, little branched. Stipules 
> subulate-linear, caducous; leaves petioled, the gland 
borne near the base of the petiole; leaflets 12-20, 
oblong or lanceolate-oblong, obtuse or obtusish, 
mucronate, rounded at the base, 1/-2’ long, 3//-6’” 
wide; flowers 7’/’-9’’ broad, numerous in axillary 
racemes on the upper part of the plant; calyx-lobes 
oblong, obtuse; stamens Io, the upper 3 imperfect; 
pod linear, pubescent or becoming glabrous, 3/—4/ 
~ long, 3’’ wide, curved. 
In swamps and wet soil, New England to Florida, 
west to Michigan, Nebraska and Louisiana, July—Aug, 
