THEIR FORMS AND FUNCTIONS, 473. 
pads (the latter being flower~buds) are well protected here by 
‘he connate stipules. The axillary buds on the lower part of 
Fig. 3. 
Callirhoé involucrata, ad nat.—a, axis; 1, uppermost perfect leaf; p, axillary 
peduncle ; s¢, stipule still free, but the first pair above this connate. 
the stem mostly consist of a solitary flower, which is also pro- 
tected in its early stages by the stipules, stem, and petiole of 
the leaf. In C. pedata, A. Gray, the stipules are similar, but 
apparently never connate. 
STERCULIACER. 
Theobroma Cacao, Linn.—Leaves alternate, distichous, petiolate, 
stipulate, oblong-elliptic, thinly puberulous beneath when young, 
glabrous when old, coriaceous, persistent ; petiole subterete or 
slightly flattened above, thickened at both ends. Stipules 
subulate, acute, green, finely puberulous, deciduous. 
Terminal bud in the resting stage covered by three or four 
scales or reduced leaves, which are caducous. In the growing 
stage it is covered by two pairs of stipules, one pair belonging 
to an expanded and developing leaf, and the other to the leaf 
about to develop. The leaf in the bud state is folded together 
or subconduplicate, very narrow, and covered with hairs ; it con- 
tinues to increase in size long after it has unfolded. 
The axillary buds are sheltered by the thickened base of the 
leaf and by the stipules, but they remain very small the first 
season and are covered by downy scales. 
In the West Australian genera Thomasia and Guichenotia the 
