356 CLASS XXI. ORDER I. 



corolla four parted ; styles two ; drupe coriaceous, 

 with a grooved nut. 



392. 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 two flowered ; corolla 

 none ; seed one, winged. 



393. 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 

 calyx. 



394. Carpinus. Barren flowers, calyx the scale 

 of an ament, roundish ; corolla none; stamens from 

 eight to twenty. Fertile flowers, calyx the scale of 

 an ament, oblong; germs two with two styles on 

 each; not angular one celled. 



395. OsTRYA. Barren flowers, ament imbricate; 

 calyx a scale ; corolla none ; filaments branched. 

 Fertile flowers, ament naked ; calyx none ; corolla 

 none ; capsules inflated, imbricated, one seeded at base. 



396. Platanus. Aments globular. Barren flow- 

 ers, corolla hardly visible; anthers growing round the 

 filament. Fertile flowers, corolla many parted; stig- 

 ma recurved ; seeds roundish, with a capillary down 

 at the base. 



Order IX. MONADELPHIA. Stamens united. 



397. PiNus. Barren flowers, calyx four leaved, 

 corolla none ; stamens many. Fertile flowers, ament 

 a cone ; calyx scale two flowered ; corolla none ; pis- 

 tils two ; nuts two, winged. 



39S. CuPREssus. Barren flowers, ament imbri- 



