378 PENTANDRIA. DIGYNIA. gonolobus, 



f Lepanthium, Nutt.J scutelliform, pentangular. An- 

 tkers openin.c^ transversely, terminated by a membrane. 

 PoUinia 5 pair, not separating into grains. Stigma de- 

 pressed. Follicle^ 2. Seeds comose. Mi c n. Fl. I. 

 p/421. R. Brown in Wern. Trans. \. p. 35. Nutt. 

 Ge?i.\.^. 162. Roem. ^ Schult. Gen. 1084. Cy- 

 WANCHi et ViNCETOXici ^/)/;. Jacq. and Walt, 

 Nat. Ord. Asclepiade^ R. Brown. Apocine^ 

 Ju s s. Stems twining, herbaceous. 



1. G. obliquus R. Br,: stem climbing, hairy; leaves 

 ovate-cordate, villous, acute ; corymbs axillary ; segments of 

 the corolla ovate, acuminate, obliqi^e, revolute. Roem. <$■- 

 S c hult. VI. p. 6*4. Cynanchum obliguum Jacq, Collect, 

 I. p. 148. Ejusd. icon. rar. II. t. 34h fVilld, Spec. I. p. 

 J2o6» Mu hi. Cat. ^.27. 



Stem 4 — 5 feet long, terete, branched. Leaves veined on both 

 sides, softly pubescent. Umbels axillary, simple, much shorter 

 than the leaves. Flowers foetid, about an inch in diameter, 

 (dark purple.) Calyx small, green ; segments much spread- 

 ing, linear-lanceolate, acute. Jacq. 



Hab. In the vicinity of Philadelphia. Barton. In Penn- 

 sylvania. Muhlenberg. July. 



Pur s h never found this plant growing spontaneously in 

 North- America, and doubts whether it be a native; but I am 

 assured by Z. Collins,, Esq. that it is certainly indigenous 

 near the Falls of the Schuylkill, about 5 miles from Philadel-* 

 phia. ' - 



2, G. hirsutiis M i c h. : sarments and petioles very hairy , 

 leaves cordate-oval, distinctly acuminate, pubescent on both 

 sides; segments of the corolla oblong, obtuse; follicles ob- 

 long, muricate. M ich. Fl. \. p. l\9. R em. S^ Sc hult. 

 VI. p. 63. Gqnolqbium hirsutum Purs/i Fi. I. p. 179. G. 

 earolinemis EllliottSk.l.ip,32Bl 



Stem trailing on the ground, or climbing over shrubs, 3-— 4 feet 

 long, pubescent ; the younger branches and petioles almost his- 

 pidly pilose. Leaves opposite, slightly auriculate at the base ; 

 sinus small, rounded. Umbels axillary, 4 — 6-fiowered, shorter 

 than the leaves ; pedicels about an inch long. Segments ot 

 the calyx lanceolate, very acute. Petals dark-purple, oblong- 

 oval or elliptical. Follicles about 4 inches long, (resembling 

 those of AscLEPiAs) armed with soft spines. Seeds crowned 

 with a long silky tuft. 



Hab. In hedges, near rivulets. Pennsylvania to Carolina- 

 P ur s h. 



The North-American species of this genus are involved in 

 much confusion. Cynanchum carelinense is, by R.Br own. re- 



