OF NORTH AMERICA. 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 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 filaments,Acerotis 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 Alleghanies 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 &,cf Ascl. nutans and viridiflora Raf. Mg. 

 Pursh &c 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 



