POLYPETALOUS EXOGENOUS PLANTS. 141 



sute on the upper surface ; leaflets rhombic-ovute, incisely 

 3-lobed, the lobes acute ; sepals 4, oblong ; carpels villous, 

 with very long capillary plumose tails. Along the tribu- 

 taries of the Kio Grande. Torr. and Gray. Drummond 

 describes one closely allied to 0. serica of Central America. 

 Stem slender, angular, somewhat hairy. Leaflets mostly 

 5, about an inch long ; the lateral lobes sometimes a little 

 toothed. Panicles about as long as the leaves, trichoto- 

 mously divided. Sepals white, villous externally. Tails of 

 the carpels very slender, more than two inches in length, 

 densely plumose. 



3. ANEMONE, L. Wind-flower. 



Sepals 4-20, colored, imbricated in the bud, deciduous. 

 Petals none. Stamens indefinite. Filaments filiform. Ova- 

 ries numerous. Ovule solitary. Aclienia capitate, com- 

 pressed, pointed by a short, naked or woolly, straight or 

 hooked persistent style. Seed suspended. Perennial herbs 

 with naked stems, bearing at the summit 2-3 opposite or 

 whorled and divided leaves, which form an involucre remote 

 from the flower. Radical leaves lobed or divided. 



A. Caroliniana, Walt. (Carolina Anemone). Stem 

 slender, 1-flowered ; ptenduncle many times longer than the 

 small, sessile, 3-leaved, 3-toothed involucre ; radical leaves 

 2-3, long-petioled, ternate, deeply parted, lobed and toothed; 

 sepals 14-20, oblong, white ; achenia numerous in a cylin- 

 drical-oblong head, woolly. March. W. Texas. 



A. HETEROPHYLLA. Lcavcs roundisli-oval, crenate seg- 

 ments ; involucre linear-cleft to the base. Sepals acute, 

 5-13 ; head of carpels cylindrical. Radical leaves one or 

 few, long-stalked (3-5) ternate, the segments stalked, simple, 

 or incisely 3-lobed or parted. Scape 8-16' high, silky pu- 

 bescent above. Leaves of the involucre totally unlike the 

 others, the segments 1-1^' by V, placed (in flower) above 

 the middle of the scape. FMuers greenish, scentless ; se- 



