OF NORTH AMERICA, 93 



give a Monograph of 32 Species at least, while 

 our Authors have only 7 or 8 ; hut Bosc and 

 Loudun have noticed 27 North American Sp. 

 while Wildenow and Pcrsoon had only 10. 

 However I have hut a dozen Sp. in my Herba- 

 riuin ollcn without flowers or fruits, and I must 

 delay this lahor ; when I will easily prove that 

 this extensive (Jenus must he divided into 5 

 Genera at least, and I am now going to estab- 

 lish them. 



721). FIIAXINUS Raf. all the Species with 

 naked flowers, without calix as in Nudilus, 2 

 stamens, and fruit a winged samare. Leaves 

 pinnate, flowers paniculate polygamous. 



730. LEPTALIX Raf. Those differing by 

 a small calix 4dcntatc &,c. Such as Fr. caro- 

 iftjtlajta, aeuminata, pubcscens, juglandifolia 

 and many other American Sp. but Bosc has not 

 noticed this important character. 



731. ORNAiNTHES Raf. 1815. Ornus P. 

 Pursh, B. E. &c. Quite different by having 

 not only a calix, hut also a corolla of 4 petals 

 as in Chionanthus . . Ornus being the root of 

 many names I changed it to OUNANTIIES mean- 

 ing the flowering Ash : 3 Sp. at least O. rotun- 

 difolia, mannifera and Americana. 



732. APLILIA Raf. Flowers and fruits to 

 be examined and described, leaves simple. 

 Probably more than a subgenus. Two Sp. at 

 least. A macrophyla and laciniata, the Fr. 

 simplicifolia of late Authors. 



733. SAMARPSES Raf. A minute triden- 

 tate calix, stamens 3 ? Fruit a peculiar samare 

 obovate with 3 wings like Halcsia, seed trian- 

 gular. Leaves pinnate This must constitute 

 a very peculiar genus, the flowers must be bet- 

 ter described. 



734. SAMARFSES TRIPTERA Raf. Fraxinus do 



