210 SIR JOHN LUBBOCK ON 
leaf are always directed under the larger stipule ; and it will be 
noted that the direction of the leaf and the larger of each pair of 
stipules are altered in each succeeding set. This is due to the 
alternate and distichous arrangement of the leaves. 
The fourth pair are oblong-elliptic, covering three-fourths of 
the bud as in succeeding cases, and more silky than the previous 
pair on the outer face, but otherwise similar. The leaf is as long 
as the next younger pair of stipules, and lying in a convex 
manner over them. 
. The fifth pair are oblong, and the outer stipule covers less 
than half of its fellow. The sixth pair are more unequal and 
very much smaller. The seventh pair are oblong-lanceolate 
and very small, while the eighth pair are still smaller and very 
membranous. l 
The next younger leaf in each case lies beneath its own stipules, 
and in that position corresponds to the opening left uncovered 
by the previous and older pair. None of the pairs of stipules 
completely surrounds the bud. 
When the buds begin to open the leaves turn down, and 
afterwards rise up again. 
The youag shoots and outer stipules are often a rich dark 
crimson, the next few pairs often a bright pink, greenish at the 
base; the following ones pale green. ` 
MALPIGHIACEX. 
Galphimia Humboldtiana, Bartl.—'The stipules are connate 
between the petioles, forming a shallow, closely fitting cup around 
the axis, then adnate to the top of the pedestal, but thence free 
from one another and from the petiole ; the free portions are 
small, ovate, concave on the inner face and imbricate. 
Terminal bud consisting of decussating pairs of leaves, face t? 
face. The expanding pair of leaves are concave, erect over the 
bud, but slightly apart. Their two pairs of stipules completely 
cover all the rest and lie in close contact, or are even slightly 
imbricate. 
` Axillary buds covered by long woolly hairs, and also by the 
imbricate stipules of the fully expanded leaves. 
ZYGOPHYLLES. 
Stipules intrapetiolar, connate. 
Guaiacum officinale, Linn. (figs. 6 & 7.)—Stem very hard, of 
slow growth, and. forking or branching dichotomously. Leaves 
