©F NORTH AMERICA. 6 J 



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 1 or 2 terminal and lateral, 

 flowers bicolor, corol green, centre pale red, 

 the tips very conspicuous black purple. 



888. OTANEMA Raf. meaning auricles 

 without Jilaments, Acerotis 1818, Asclepias El- 

 liot and authors. Ditiers 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 «fec, 



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 

 subovate, petiolate, acute flat, base often 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 (fee. Ascl. nutans and viridiffora Raf. Mg. 

 Pursh Slq, leaves lanceolate sessile flat, acute at 

 both ends — from New England to Kentucky &,c. 

 Leaves 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 



