WINTER KEY TO THE SPECIES OF CATALPA 
a. 
aa. 
Fruiting capsules about %4 inch thick; seeds with pointed, 
fringed wings at each end; branches rather crooked and 
straggling; bark thin, separating into thin scales on the 
trunks caccserwes Pees Pank acy aeeace C. bignonioides, p. 227. 
Fruiting capsules about %4 inch thick, seeds with rounded, 
wide-fringed wings at each end; branches not crooked and 
straggling; bark thick, separating into thick scales on the 
AMI Ake ites etal detey sha ae exe eacaawae C. speciosa, p. 225. 
— 223 — 
