Page:An introduction to physiological and systematical botany (1st edition).djvu/474

 444 mistaken species are removed to their proper places. See Fl. Brit.

*** Legume imperfectly divided into two cells, always, as in all the following, without the character of the preceding sections. This is composed of the singular Biserrula, known by its doubly serrated fruit, of which there is only one species; the Phaca, Jacq. ''Ic. Har. t. 151; and the vast genus of Astragalus, Engl. Bot. t.'' 274, &c., lately illustrated in a splendid work by an able French botanist, Decandolle.

**** Legume with scarcely more than one seed. Of this Psoralea, ''Curt. Mag. t. 665; the curious Stylosanthes of Swartz; the Hallia of Thunberg; and our own Trifolium, Engl. Bot. t.'' 1770, 1048—1050, are examples. The last genus, one of the most natural as to habit and qualities, is extremely untractable with respect to botanical characters. Some species, t. 1047, 1340, 1769, have many seeds in each pod; some have not even the capitate inflorescence made a part of the generic definition. The difficulty is lessened by establishing Melilotus as a genus, with