BUDS AND STIPULES. 215 
the petiole is short, convex on the upper surface, suddenly 
thickened and subterete at the base, and covered by a dense 
pubescence. The buds are densely tomentose. 
LEGUMINOSA. 
Robinia viscosa, Vent.—The stipules (fg. 12) of this species 
Figs. 12 & 13. 
12. Robinia viscosa, nat. size. s, s, spiny stipules sketched in winter (Jan. 25, 
1897); se, scar of fallen leaf ; g, gland above the bud. 
13. Robinia Pseudacacia, var. Decaisneana, nat. size. s, s, spiny stipules 
sketched in winter (March 13, 1897) ; sc, scar of fallen leaf; g, gland 
above the bud. 
sre subulate and at first soft, but ultimately they become much 
lated at the base, compressed laterally, woody and spiny. 
ose on vigorous shoots only attain this development, so that 
adult trees are furnished with them only on those shoots that 
made vigorous growth the previous season, especially on the 
lis e of the tree. They are inserted right and left, just a 
exactly pe the scar of the fallen leaf, with the lateral bud 
tomards NU them. They vary greatly in size, being smaller 
larger o e base and apex of the shoot bearing them. The 
while the. are more or less directed downwards or deflexed, 
tion Smaller ones are more or less horizontal. Their func- 
seems to be for the protection of the tree, or its leaves and 
d m general against browsing animals. A gland is 
Just above the small, inconspicuous, lateral bud. 
ontacuia, Linn., var. Decaisneana, Carr.—The typical 
acia has stipules resembling those of Jt. viscosa both 
in size elu . : 
and distribution ; but the var. Decaisneana is a much more 
api i 
o M me A very large proportion of the shoots, whether small 
(fig. D are furnished with broadly subulate, spiny stipules 
The illustration shows the small bud between the 
