MONOECIA. POLYANDRIA. £19 



The original species of the genus ( C. Betulvs) is indi- 

 genous to Europe, there is also a third in the Levant. 



757. OSTRYA. Michdi. (Hop-liornbeam Tree.) 

 Anient imbricated. Masc. Calix consisting 



of scales. Filament of the stamina ramose. 

 Fem. Anient naked. Capsules inflated, imbrica- 

 ted at the base, 1 -seeded. 



Habit similar to that of preceding genus. 

 Spscies. 1. O. virghiica. — Of this genus there is a se- 

 cond species in Europe. 



758. PLATANUS. i. (Buttonwood. Sycamore.) 

 Ament globose. Masc. Calix none. Corolla 



scarcely manifest. Anthers adnate to the fila- 

 ments from the base. Fem, Calix many-leaved. 

 Corolla nowQ. Stigmas yqcwv\q>{\. Capsules sub - 

 clavate, 1 -seeded, mucronate with the style, 

 pappose at the base. 



Large trees; leaves (as in the Maple) palmately lobed 

 or angularly divided; stipules large; aments pendulous. 



Species. 1. P. occidentalis. — Of this genus there are 3 

 other species natives of the Levant. 



759- LIQUID AMBAR. L, (Sweet-gum Tree.) 

 Masc. Anient conic, surrounded with a 4- 

 leaved involucrdm. Calix and corolla none. Fir 

 laments numerous. Fem. Anient globose, also 

 surrounded witlj a4-Ieavcd involucrum, Calix 

 1-leaved, urceolate, 2-ilowered. Styles 2, Cap- 

 Sides 2, surrounded by the base of the calix, I- 

 cciled, many-seeded. 



Balsamiferons trees with sinuatcly palmated leaves 

 (similar to tiiO-eof ihe l\iap!e); aments aggre.^-ated, termi- 

 nal, masculine deciduou.s, females psdunculaled and pen- 

 dulous. 



Species. 1. L. Siyracifua. From New Engliind to Flo- 

 rida, also indigenous to Mexico and exanding to the shores 

 ef the Pacific ocean. In the v/armer parts of America 

 exuding a balsamic resin. Obs. Female amcnt glo- 



