TRIANDRIA. MONOGTNIA. SI 



spikelets constantly subimbricate. — Calix 2- 

 valved, 1-flowercd, the valves unequal. Carol- 

 la 2-valvecl, lari^er than the calix. Seed tri- 

 quetrous. (Stamina 1, 2, and 3; stigmas 2, 

 and 3.) 



Flowers capitate, or umbellate-capitate, terminal; in- 

 voliicrum of the head or umbell 3,4, or many-leaved; 

 cuhn often triangular. (According to the observations 

 of Mr. Elliott, in his Sketches of the Botany of Soutii Ca- 

 rolina and Georgia, xbv K. piimila of Mich, has no calix, 

 and tlie K maculata of M. a calix of only 1 leaf.) 



Species. 1. mmiocephala. 2. piimila. 3. maculata. 



Obs. With the exception of the species indigenous t» 

 the United State:*, the genus KylUngia is confined to the 

 tropical regions of India and America. 



45. MAPANIA. JluUet. 



Flowers capitate, subtended by a large, S- 

 leaved involucrum. — Calix 0. Corolla 6-vaIved, 

 valves toothed, and imbricaied. Stigmata 3. 

 Seed intimately enveloped by a chaffy 6 parted 

 perisporium (or involucellum.) 



Culm U'iquetrous, sheathed at the base with short squa- 

 mose lanceolate leaves; flowers in a terminal involu- 

 crate capitulum, the involucrum consisting of 3 large 

 whiter leaves. 



Species. 1. sylvatica. It is extremely doubtful whe- 

 ther this singular grass of Guianne has ever yet been found 

 in the United States. Mr. Kinn, said to have been the dis- 

 coverer by Mr. Pursh, on being questioned regarding it, 

 by my friend Zaccheus Collins, tsq. produced the C'a- 

 rex Fraseri aa the identical plant shown to Mr. P.; I have 

 been, however, induced to insert it for future examina- 

 tion, as it may probably yet be discovered in some extre- 

 mity of the Southern states. 



46. DICHROMA. Persooi^. 



Spike capitate, involucrate, squamse or ghi- 

 maceous scales on all sides imbricated into ses- 

 sile crowded spikelets, the lower scales empty. 

 — Corolla Style setaceous, bifid. Seed with- 

 out set» (or invoiucellate filaments;) somewhat 



