ASCLEPIADACE^. 643 



Obdek ASCLEPIADACE^. 



ASCLEPIAS, L. 



A. Curtissii, Gray. Stem puberulous (l°-3° liigh); leaves smooth, 

 oval, acuininate or obtuse (H' long) ; umbel solitary, terminal, short-pedun- 

 fled, loosely few-flowered ; flowers yellowish-green; pedicels twice as long; 

 leaves of the crown somewhat hastate-lanceolate, erect, more than twice as 

 long as the gynostegium and the incurved horn ; anther- wings very broad ; 

 column short. — Eastern part of South Florida (Curtiss). 



ENSLENIA, Nutt. 



Calyx 5-parted. Corolla bell-shaped, 5-parted : crown inserted on the 

 base of the gynostegium, 5-leaved, each leaf deeply cleft, with the lobes 

 prolonged into a slender flexuous point. Stigma subconical. Follicle fusi- 

 form. Seeds comose, flat. — A perennial twining vine, with opposite cordate- 

 ovate acuminate leaves, and small white fragrant flowers in axillary umbels 

 or corymbs. 



E. albida, Nutt. — River-banks, Cenrgia, Alabama, and northward. 

 July. 



GONOLOBUS, Michx. 



G. hirsutUS, Michx. Pubescent and hirsute ; leaves ovate, cordate, 

 acuminate; peduncle of the 6-8-flowered un)bel equalling or shorter than 

 the petiole ; corolla dark purple, ovate in the bud, the oval or oblong lobes 

 smooth within; margins of the crown 10-crenate; "follicle muricate." — 

 Woods, Florida, and northward. 



G. obliquus, R. Br. Leaves broadly cordata, short-acuminate, or mucro- 

 nate-pointed ; umbel simple or compound, long-peduncled; corolla crimson 

 purple, long-conical in the bud, the linear lobes smoothish within; margins 

 of the crown 10-crenate ; follicle terete, muricate. — Banks of the Coosa 

 River, North Georgia, and northward. July. 



G. Carolinensis, R. Br. Leaves cordate, acimiinate ; peduncle rather 

 longer than the petiole ; corolla brownish purple, oblong in the bud, the 

 oblong lobes smooth within ; crown obtusely 6-lobed, and with a longer 

 bifid process in the sinuses. — South Carolina, and westward. 



G. Baldwinianus, Sweet. Stem and cordate leaves pubescent and 

 hairy ; peduncles mostly longer tlian the petioles ; umbel simple or com- 

 pound; flowers oblong-oval in the bud, white, the lobes somewhsy; spatulate; 

 crown 6-crenate, witli a pair of subulate processes in the sinuses. — Calca- 

 reous soil, Florida and Alabama. 



