482 SIR JOHN LUBBOCK ON STIPULES, 
arrested, although a large number of them on the stronger stems 
elongate, forming branches. 
SAPINDACER. 
The Sapindaceex are generally exstipulate. 
Paullinia forms an exception. The leaves are alternate, 3-4 
times pinnate, petiolate, stipulate, evergreen, pubescent while 
unfolding, but afterwards glabrous, or nearly so, or sparsely 
pilose ; petiole subterete, shallowly grooved above, densely pubes- 
cent with curled or hooked hairs; thickened, and pulvinated at 
the base. 
The stipules are moderate in size, subulate, acute, pubescent. 
The segments of the leaves are separately involute or im- 
perfectly conduplicate, and, with the branches incurved, form 
a clavate mass. The stipules attain full size, or nearly so, in 
the bud, and occupy the space between the axis and each 
leaf. 
Serjania contains some species which are exstipulate; but 
S. Caracasma, Willd., has small subulate stipules, which often 
persist after the leaves have fallen. 
In the Maples, where stipules are absent, the bud is protected 
by scales which, as Goebel has shown, represent a broadening of 
the leaf-base with, at the same time, suppression of the upper 
part. 
In Melianthus major, Linn., the leaves are imparipinnate, alter- 
nate, stipulate, with the leaflets more or less decurrent upon the 
midrib, especially the uppermost pair. 
The stipules are large, foliaceous, adnate to the petiole for 
the lower half of their length or more, free from the petiole in 
the upper portion, but intrapetiolar and connate almost to the 
apex, which is bidentate, decurrent below the insertion of the 
petiole, adnate to the stem, amplexicaul, and connected at the 
base on the posterior side by a slight rim, glaucous, glabrous ; 
the upper free portion is ovate. 
These stipules do not protect their own leaf, but are completely 
rolled round all the younger members of the terminal bud, and 
even slightly overlap one another, as in Leea coccinea, Planch... 
and Bucklandia populnea, R. Br. Their being decurrent upon 
the stem enables them the more completely to enclose the bud. 
Their own leaf nearly attains full size before they themselves 
unfold. After they spread open they only afford partial shelter 
