ICOSANDRIA— MONOGYNIA. 



naked, fixed on a large, pulpy, deciduous recep- 

 tacle. 

 534. CALYCANTHUS. Cal. urceolate, many-cleft 

 above ; segments squarrose, coloured, petaloid. 

 Cor. 0. Styles numerous. Seech numerous, naked, 

 smooth, included in a ventricose, succulent calyx, 



ICOSANDRIA. 



MONOGYNIA. 



315. CACTUS. Indian Fig, &c. Cacti. 



C. Opuntia: articulately proliferous; articulation^ 

 compressed, ovate ; spines setaceous ; fruit suc- 

 culent, smooth. 



HAB. Rocks and Sandy fields. June — July. U 

 Procumb., leafl., fleshy ; fl. yell. 



316. PRUNUS. Plum and Cherry. Rosacea.'. 



* Floivers racemose. 



i. P. virginiana: racemes erect, elongated ; leaves de- 

 ciduous, oval-oblong, acuminate, shining above, 

 serrate, smooth on both sides ; petioles with 2 — 4 

 glands. 

 HAB. Woods. May. A large tree ; racem. simp. ; 

 fl. Teh. ; drupe black. 



2. P. serotina : racemes loose, at length pendulous ; 



leaves deciduous, ovate, with a short acuminatum, 

 doubly and very acutely serrate ; midrib bearded 

 on each side towards the base ; petiole with 2 

 glands. 

 HAB. Woods. May. A small tree ; leav. thin 

 drupe red. 



3. P. canadensis: flowers in racemes; leaves decidu- 



ous, without glands, broad-lanceolate, rugose, pu- 

 bescent on both sides. 

 HAB. Pennsylvania. Branch smooth ; leav. without 

 glands ; base atten. +. 



* Peduncles subumbellate or solitary. 



4. P. pennsylvanica : flowers subcorymbed : pedicel? 



