on the natural Group of Plants called Pomacea. 105 



Stamina 10 — 15 basi vix dilatata, erecto-patentia. Discus te- 

 nuis. Ovarium nudum. Stylus crassus subclavatus, basi pu- 

 bescens. (Fructus immaturus dispermus. Sol.) 



Variat foliis majoribus et minoribus. 



That variety of Crataegus Oxyacantha which has been called 

 monogyna, can by no means affect the importance of the charac- 

 ter by which I propose to distinguish this genus ; because in the 

 former the unilocularity of fruit is not connected with a corre- 

 sponding structure of ovarium, but arises from the abortion of 

 one style. In the present plant the ovarium in its youngest 

 state is absolutely unilocular. 



XI. RAPHIOLEPIS. 



Crataegi species. Linn. 



Catycis limbus infundibuliformis deciduus. Filamenta filiformia. 

 Ovarium biloculare. Pomum disco incrassato clausum, puta- 

 mine chartaceo. Semina gibbosa. Testa coriacea crassissima. 



Frutex (Chinensis). Folia simplicia crenulata coriacea reticulata. 

 Racemi terminates bract eis foliaceis persistentibus squamosi. 



1. Crataegus indica Linn. 



2 ? Crataegus rubra Lour. 



XII. CRATAEGUS Linn., Willd. 



Mespili pars. Smith, Willd. Pyri sp. Willd. Hahniae pars. 

 Medicus. 



Cat. 5-dentatus. Petala patentia orbiculata. Ovarium 2 — 5- 

 loculare. Styli glabri. Pomum carnosum oblongum denti- 

 bus calycinis v. disco incrassato clausum, putamine osseo. 



Frutices (America septentrionalis, Europce, Asia temperate et 

 Africce borealis) spinosce. Folia angulatav. dentata, nunc sem- 

 pervirentia. Cymae terminates plerumque multiflorce patentes. 

 Bracteae subulatce decidua. 



vol. xin. p Crataegus 



