CLASS XXI. ORDER I. 355 



mens. Fertile ones with numerous pistils ; capsules 

 many, swelling, one seeded. 



384. Myriophyllum. Calyx four leaved, corolla 

 four petalled. Barren flowers with eight stamens. 

 Fertile ones with four stigmas; seeds four, coated. 



385. Ceratophyllum, Calyx many parted ; corolla 

 none ; anthers tricuspidate ; stigma nearly sessile, nut 

 one seeded. 



386. Arum. Spathe one leafed ; spadix cylindrical, 

 naked at top, with stamens in the middle and germs 

 at the base ; berries one celled. 



387. Calla. Spathe ovate; spadix covered with 

 flowers; corolla none; berry many seeded. 



388. 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. 



389. Castanea. Barren flowers, ament naked ; ca- 

 lyx none; corolla five or six petalled; stamens from 

 five to twenty. Fertile flowers, calyx five or six 

 leaved, muricated ; corolla none; germs three; styles 

 six ; stigma pencil form ; nuts three, contained in the 

 prickly calyx. 



390. 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. 



391. JuGLANs. Barren flowers, ament imbricate ; 

 calyx scale form; corolla six parted; filaments about 

 eighteen. Fertile flowers, calyx four cleft, superior; 



