bipinnate, with 2-7 pairs of pinnae, each pinna with 12-35 
pairs of leafiets; leaflets linear or linear-oblong, very 
obtuse, sometimes minutely apiculate, truncate at the base, 
minutely ciliate, appressed pubescent, puberulous or 
glabrous on both surfaces. Pedwneles solitary, or two 
together in the axils. Heads about 2 in. in diameter, 
composed of more than 30 sessile pure-white flowers. 
Calya-lobes deltoid, ciliate with non-glandular hairs in their 
upper half, and with gland-tipped hairs in the lower. 
Corolla about 4 in. long, with reflexed lobes. Stamens 
about 1 in. long. Pod 2-4 in. long.—T. A. Seracus. 
Fig. 1, leaflets ; 2, a flower; 3, pistil:—all enlarged. 
