No. 91. • TRILLIUM. 97 



of the whole genus. Boot perenniaL Stem terete 

 smooth, ered^ with 3 verticUlale leaves and one terminal 

 flower^ 



Sp. Trillium latifolium. See sp. 25* 



HISTORY. This beautiful natural genus is peculiar 

 to North America j the nearest genera are the European 

 Paris, differing merely by perigone 8 parted, 8 stamens, 

 4 stigmas, and 4 leaves. 2. The American Medeola^ 

 which has a simple caducous 6 parted perigone, whorl 

 of several leaves, flowers umbellate. Linnseus had on- 

 ly 3 species of Trillium. Tr. sessile, Tr. erectum, and 

 Tr. ccrnuum. Michaux, Pursh, Nuttal, Elliot, Beck, 

 &c. have increased them to about 15 ; but having paid 

 particular attention to this interesting genus, I have as- 

 certained as many as 33 species, with a multitude of 

 varieties j all bear the above vulgar names, and are 

 ornamental, but scentless. Many are scarce species, 

 chiefly found in the Alleghany, Cumberland, Cherokee 

 or Apalachian mountains, the western glades, &c. They 

 are all vernal, blooming in the spring. I propose to 

 give here the Prodromus of their monography. I divide 

 the genus into 3 subgenera. 



L Sessilinm. Petals erect, anthers adnate, filaments 

 flat,^ stigmas sessile. Flowers sessile, erect, (the Tr. 

 sessile of L. 



S- Antiiopium. Petals spreading, anthers terminal, 



filaments not flat, stigmas sessile. Floivers pedunculate, 

 erect or drooping. 



3, Deloslylium. A style, 3 stigmas. Flower pedun- 

 culate. 



L S. G. Sessilium. 

 l.Sp. Trilium longi^orum.U^f. Leaves sessile, spread- 

 ing, ovate acute, 5 nerved : petals lanceolate, twice as 

 long as the calyx, sessile, acute and purple. The Tr^sessile 

 of modern authors, which name is wrong and illusive. 

 Found from Lake Onurio to Carolina. Root thick pre- 

 mose, and berry purple, as in most all the species ; many 

 varieties: l.Macidatum. 2.^tropurpureum, S. Farvifo' 

 Hum. 4. Purnilum. 5*FubricauU. 6, Uiulnlatunu T.La- 

 tifolium. 



2. Tr. rotundifoliurn. Raf. Leaves spreading, sessile, 

 rounded ovate, obtusely acuminate, 5 nerved : calyx 



