204 SIR JOHN LUBBOCK ON 
The axillary buds are protected in the deep groove at the base 
of the petiole, and develop while the petiole is still erect. 
The leaf develops a long petiole while still covered by the 
stipules,and is folded much in the same way as that of Magnolia 
glauca. 
CISTINES. 
I have already given several illustrations from this order. 
In Cistus vaginatus, Ait. (fig. 5), the petioles are more sheathing 
than in any of the species previously noticed. The leaves are 
opposite, ovate, acuminate, 3-nerved in the lower half, petiolate, 
thinly villous but densely glandular-pubescent and viscid on both 
surfaces, as are the stems; petioles terete, ridged and furrowed, 
sheathing at the base; sheaths connate, forming a cylinder 
enclosing the stem, 1-1:8 em. long. 
Fig. 5. 
Cistus vaginatus, nat. size. 
% 4, axis; l, portion of leaf; sk, sheath formed by the dilated and connate 
bases of the petioles ; ab, ab, axillary buds. 
The terminal bud consists of several successive pairs of leaves, 
each pair protecting all the younger ones. 
The oldest two leaves before expansion are rolled round one 
another, and have one edge of each inside one of the other of the 
pair. They attain a length of 4°5 cm., more or less according fo 
their vigour, and about this stage leave the back of the not 
younger pair uncovered about the middle of the same, the sheath 
protecting the base. The leading bud is, therefore, well pro 
tected till the leaves attain a considerable size. The gum of the 
glandular hairs and the silky covering of the young leaves, 48 well 
