241. Cassia marilandica.—American Senna.  241. CASSIA
MARILANDICA Linné.—AMERICAN SENNA. (Leaflets.) Oblong-
lanceolate, about 25 mm. (1 in.) in length, mucronate at the
apex and uneven and short-stalked at base; lower surface lighter
green than upper surface. They have a weaker odor and taste than
senna, but have similar medicinal properties, their action
depending upon the same principle, cathartic acid.