OP NORTH AMERICA. 93 



give a Monograph of 32 Species at least, while 

 our Authors have only 7 or 8 ; but Bosc and 

 Loudun have noticed 27 North American Sp. 

 while Wildenow and Persoon had only 10. 

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

 rium often without flowers or fruits, and I must 

 delay this labor ; when I will easily prove that 

 this extensive Genus must be divided into 5 

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

 lish them. 



729. Fraxinus Raf. "^all the Species with 

 naked flowers, without calix as in Nudilus, 2 

 stamens, and fruit a winged samare. Leaves 

 pinnate, floicers paniculate polygamous. 



730. LEPTALIX Raf. Those differing by 

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

 liniana, acuminata, jnibescens, jiiglandifolia 

 and many other American Sp. but Bosc has not 

 noticed this important character. 



731. ORNANTHES Raf. 1815. Ornus P. 

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

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

 as in Chionanthus . . Ornus being the root of 

 many names I changed it to Ornanthes 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 Halesia, seed trian- 

 gular, heaves pinnate — This must constitute 

 a very peculiar genus, the flowers must be bet- 

 ter described. 



734. Samarpses tkiptera Raf. Fraxinus do 



