ASCLEPIADACE^. 643 



Ordek ASCLEPIADACE^. 



ASCLEPIAS, L. 



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

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

 cled, 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 (Vurtiss). 



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, Georgia, Alabama, and northward. 

 July. 



GONOLOBUS, Michx. 



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

 acuminate; peduncle of the 6-S-flowered umbel equalling or shorter than 

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

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

 Woods, Florida, and nortliward. 



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

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

 purple, long-conical in the bud, the linear lobes smoothish witliin ; 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, acuminate ; peduncle rather 

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

 oblong lobes smooth within; crown obtusely 5-lobed, and witli a longer 

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



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

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

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

 crown 5-crenate, with a pair of subulate processes in the sinuses. — Calca- 

 reous soil, Florida and Alabama. 



