PENTANDRIA, DIM MA. 1 1 



tancular, without alated lateral BUtrtaofi or 

 terminal membranaceous cusps. l J <>lliniu 

 (masses of pollen) ."■> pair, even, transverse* 

 follicles 1. Seed comose. — JS'utt. 



l. (i. stem twining, hirsute i leaves ovate-cordate, obSfWM, 

 acute : corymbs axillary; segments of the co- 

 rolla <>\ ate acuminate. 



Gonolobus obliquus, Muhl. 



Cynanchum obliquum, L. Sp. pL l.p. 125G. 



A twining- plant with dark purple flowers, with linear 

 spreading petals. On the hanks of the Schuylkill from Lemon- 

 hill to the- falls. On the botanic garden-ground of the I'ni- 

 >ity of Pennsylvania. Not common. Perennial. June. 



ASILEPIAS. Gen. pi. 42<J. (Apoeynet.J 



Culi.v small; 5 parted, persistent Corolla 



rotate mostly reflected. Lepanthium (nec- 

 tary. L.) simple, 0-parted, segments ovate, 

 nu ullate, each producing from its base an 

 internal subulate averted awn. Jlntheri- 

 dium 0-parted, crustaceous. sessile, angles 

 opening by 3 longitudinal chinks, follicles 

 .2. \entrito<-e. acuminate, smooth or muri- 

 < ate. Seed comose. — A'utt. 



1. A. stems simple, leaves lanceolate-oblong, syn 

 acute tomentosc beneath; umbels somewhat nu- 

 tant. tomentose. — Willd. and J'ursh. 



\. Sj riaca /3. Midi. 



A. Illinoensis, /3 Svriacae, Pers. 



.^idk-icccd. Syrian Swalloiv-icort. Silk-uctd. 



Wild-cotton, 



The commonest species of this genus in this neighbourhood. 

 From three to four feet high. On the banks of the Schui 1- 

 kill, Delaware, and all our creeks, reiy frequent. Perennial. 

 June. 



:. A. stem erect, simple, leaves broad-ovate-oblong, P hy^u 

 acute, smooth, paler underneath; umbeN com-" 



