i. Bud at end of twig very obliquely unsym- 
metrical, mucilaginous when chewed....... 
SRS ee Seen TILIA, p. 201. 
ii, Bud at end of twig symmetrical, not muci- 
laginous when chewed. 
j. Bud-scales 2-3 visible; pith star-shaped in 
ji. 
cross-section; sap not milky; fruit a 
prickly bur, present; large tree.......... 
adayon taedddoeiasist as CASTANEA, p. 95. 
Bud-scales 4-8 visible; pith not  star- 
shaped in cross-section; sap milky; fruit 
berry-like, not present; small tree........ 
SORE er eee Sv eeeeseeees-MORUS, p. 135. 
— XXXII -~ 
