TkKKS (IF THK XoNTIIKK.V UnITKD StATF,!- I'l 



,1. Paulownia. (76). 



\'\. [^'lowers irrcL^ular. zygoinorphic ; seeds minicrous. 

 fertile stamens usually 2 with •? vc>tijj:es; pitl. 



solid. BiCNONIACEAE. 



a. Catalpa. (77). 



U. StanieiiN twice as nian^' as the lobes of the corolla 

 or more: lea\-es alternate and simi)le. 4'». 



44. Stamens a> many as the lobe> of the corolla; leave- 

 opposite or whorled, simple. 4G. 



I-V Corolla yellow ; stamens in several series. Svmplocaceae. 



a. Symplocos. (71) 

 \'k (."orolla white: stamens in one series. Stnracackak. 



a. Halesia. (7lM. 



Ki. Stijiules present; flowers in dense heads in our species; 

 usuall\- blackenin<; in dr\in,u-. Rim'.iackae. 



a. Cephalanthus. (Si). 



4(}. Usually without stipules; llowers in compound cyme< 

 in our species; not blackenin.^- in drying-. 



CaPRIF()I.TA(K.\(E. 



a. Viburnum. (8:V). 



