242 SIR JOHN LUBBOCK ON 
little hindrance to the expanding bud. The outer scale consists 
of a pair of connate stipules, not ieaves. 
The outer scale (fig. 64) has no leaf in connection with it. 
Figs. 63-67. 
67. 
Alnus glutinosa, X 3. 
63. Portion of shoot bearing a lateral bud ; o.s, outer scale ; 5.5, second scale, 
that is, the outer one of a pair of stipules. 
64. Outer scale of winter-bud. . 
65. o.s, outer, and is, inner stipule of the first distinct pair; 1, their e 
flattened out like the stipules. . 
66. o.st, outer, and i.s¢, inner stipule of the second distinct pair ; 1, their leaf 
67. o.st, outer, and i.s¢, inner stipule of the third distinct pair ; 1, their leaf. 
The second pair of stipules (fig. 65) of the more typical lateral 
buds are free, unequal, imbricate, and completely cover " 
own leaf and all the younger members of the bud. The outer 
stipule of this second pair is ovate, more or less exposed along 
the middle and at the apex, which is curved, the exposed por 
being more coriaceous than the rest. The inner of the tw? 5 
half-ovate, pale green, and membranous. Both are traver! 
longitudinally by slender parallel nerves. The leaf in connec 
with the second pair is lanceolate-oblong, acute, serrate, glan ^ 
and plicate along the course of the ascending nerves. Its T de 
or less folded over the younger members of the bud. All . 
leaves and stipules are glued together by a viscid, reso 
fragrant gum, secreted by glands. 
anm 
