POLTPETALOUS EXOGENOUS PLANTS. 209 



JE. Pavia. Stamens slightly exserted ; claws of the two 

 upper petals as long as the tubular calyx ; panicle oblong; 

 leaflets 5, varying from lanceolate to oval, short-acuminate, 

 finely serrate, smooth, or nearly so, on both surfaces. A 

 shrub or small tree ; flowers red. 



M. ARGUTA, Buckley. Fruit covered with prickles ; 

 stamens erect or slightly curved, much longer than the 

 pale yellow corolla ; calyx campanulate, divisions obtuse ; 

 pedicels short; whole panicle subpubescent ; flowers i\.Qn&Q\ 

 leaflets 7, glabrous, ovate-lanceolate, acute at both ends, 

 sliarplyand unequally serrate. — Shrub, 3-5-feet high, with 

 a smooth bark. Flowers in March. Panicles 4-6 inches 

 long. Leaflets 2-4 inches long. Hills in the vicinity of 

 Larissa, Texas. 



40. MILKWORT FAMILY. Order, Polyoalace^. 



Herbs or shrubs^ with simple exstipulate leaves. Floivers 

 irregular, unsymmetrical, hypogynous, perfect ; sejjals 5, 

 very unequal, distinct, 3 exterior, 2 (wings) interior, large, 

 petaloid; petals^, the anterior (keel) larger than the 2 

 posterior ; stamens 4 to 8, distinct or cohering in a tube 

 which is split on the upper side ; ovary superior, com- 

 pound, with suspended ovules; united styles and stigmas; 

 fruit a 2-celled, 2-seeded pod. Seeds pendulous, furnished 

 with a caruncle (a small scale entire or cleft). 



POLYGALIA. Milkwort. 



§ Flowers in globose or oblong more or less compact spikes. 

 * Spikes corymbose ; biennials. 



P. CYMOSA, "Walt, stem tall, simple; leaves ^cMeredi, 

 linear-acute, the upper bract-like, the lowest long and 

 crowded; corymbs simple or compound; ivings oblong, 



