226 SIR JOHN LUBBOCK ON 
half of the upper surface, glabrous downwards, but ciliate and 
pilose beneath, slightly dilated again at the very base, with narrow 
membranous margins there. 
Stipules scarious, colourless, intrapetiolar, and inserted a little 
above the base, tripartite as a rule, with the two lateral segments 
linear subulate, and decurrent upon the edge of the petiole, 
forming the membranous margin, while the middle segment is 
broadly subulate and more or less fringed at the apex. 
Terminal bud sheltered by the stipules, which project towards 
the axis, while by a slight bending of the base of the petiole they 
are nearly at right angles to the lamina. 
Axillary buds rarely develop, so that the crown or rosette is 
solitary even after many years. Should a bud arise it would be 
more than protected by the imbricate leaves aud their stipules. 
In Drosera binata, Labill. (syn. D. dichotoma), the leaves are 
radical, with long petioles, stipulate, with the lamina forked or 
seemingly dichotomous, covered on the upper surface with ten- 
tacles of various lengths, and tipped with a red gland ; petiole 
long, slightly flattened, biconvex, glabrous, not dilated at the base. 
The stipules are inserted at the very base of the petiole aud 
seemingly upon the axis in all cases; the interpetiolar ones are 
subulate, sometimes ovate, and glandular serrate; the intra- 
petiolar portion is short and more or less deeply incised ; all are 
persistent. The terminal or axial buds are small and covered 
by the intrapetiolar portion of the stipules. The axillary buds 
are not developed till the plants attain some size at least. 
In Pinguicula caudata, Schlecht., the central or terminal bud is 
covered by one, or at most by two leaves. The latter are erect 
at this stage, rolled round the younger members and involute 
at the margin. A leaf in the process of expansion leaves à small 
portion of the next younger one exposed; but the latter com 
pletely surrounds all the rest, while its own margins are also 
involute. 
Axillary buds develop during the course of the $ 
remain hidden amongst and covered by the leaves. When the 
latter die down the buds are in the form of small bulbs consisting 
of imbricated leaves, and which become detached as offsets. 
eason, but 
CactEs. . 
The Cacteæ are exstipulate. In Pereskia, which, however» S 
an abnormal representative of the Order, the petiole is 3€" 
