332 Class XXI. Order VIII. 



408. CALLA. Spathe ovate ; spadix covered with 

 flowers; corolla none ; berry many seeded. 



409. FAGUS. Barren flowers, calyx campanulate, 

 five or six cleft ; corolla none ; stamens from eight to 

 twelve. Fertile flowers, calyx from four to six tooth- 

 ed, hairy ; corolla none ; germs two ; nuts two, con- 

 tained in the coriaceous., four cleft, prickly calyx. 



410. CASTANEA. Barren flowers, ament naked ; 

 calyx none ; corolla five or six petalled ; stamens from 

 five to twenty. Fertile flowers, calyx five or six leav- 

 ed, muricated ; corolla none ; germs three ; styles six ; 

 stigma pencil form ; nuts three, contained in the prick- 

 ly calyx. 



411. QUERCUS. Barren flowers, ament naked; 

 calyx four or five cleft ; corolla none ; stamens from four 

 to ten. Fertile flowers, calyx commonly six toothed ; 

 corolla none ; styles from one to five ; nut coriaceous, 

 surrounded at base by the persistent calyx. 



412. JUGLANS. Barren flowers, ament imbricate; 

 calyx scale form ; corolla six parted ; filaments about 

 eighteen. Fertile flowers, calyx four cleft, superior; 

 corolla four parted ; styles two ; drupe coriaceous, 

 with a grooved nut. 



413. BETULA. Barren flowers, ament imbricate, 

 scales peltate, three flowered ; calyx a scale ; corolla 

 none ; stamens from ten to twelve. Fertile flowers, 

 ament imbricate ; calyx scale twp flowered ; corolla 

 none ; seed one, winged. 



414. CORYLUS. Barren flowers, calyx a scale of 

 the ament, three cleft ; corolla none ; stamens eight. 

 Fertile flowers, calyx two cleft, lacerated ; styles two ; 

 nut ovate, smooth, surrounded with the persistent ca- 

 lyx. 



