OF NORTH AllIERICA. 



61 



from Arkanzas, anonymous in Coll. herb, stem 

 pedal slender, with obtuse angles above as in 

 the last, leaves adpressed 2 to 4 inches long very 

 narrow, umbels I or 2 terminal and lateral, 

 flowers bicolor, corol green, centre pale red, 

 the tips very conspicuous black purple. 



888. OTANEMA Jiaf. meaning auricles 

 witkout Jilaments.Xceroiis 1818,Asclepias El- 

 liot and authors. Differs from last by central 

 body with membranes for appendages above and 

 no shining hard tips, leaves opposite umbels ax- 

 illary sessile nodding. I have 3 sp. of it, all have 

 simple terete stems and pubescent leaves, um- 

 bels multiflore globose, flowers greenish &c, 



889. Otanema LATiFOLiA Raf. leaves ellipti- 

 cal or rounded, obtuse or retuse, mucronate pe- 

 tiolate, undulate reticulate roughly pubescent 

 rigid— from the AUeghanies to Kentucky in 

 glades, pedal and sesquipedal, leaves nearly 2 

 inches long, over one broad, sometimes almost 

 round seldom obovate — Var. Retusa, all the 

 leaves retuse. 



890. Otanema ovata Raf. leaves ovate or 

 fiubovate, petiolate, acute flat, base ofl:en sub- 

 cordate, roughly pubescent— from New Eng- 

 land to Virginia, smaller plant ^ leaves chiefly 

 uncial, flowers fewer, perhaps another var. of 

 the last, petiols very short as in last. 



891. Otankma lanceolata Raf. Ascl. do 

 Ives &.cf Ascl. nutans and viridiffora Raf Mg. 

 Pursh &.C leaves lanceolate sessile flat, acute at 

 both ends— from New England to Kentucky &c. 

 Leases 2 or 3 inches long, narrow. These 3 

 plants as in Ansonia and Upopion show the 

 gradual deviation of species in shapes of leaves. 



892. AscLEPiAS MEGALOTis Raf hardly pu- 

 bescent, leaves opposite subsessile, elliptic base 



