174 COMPOUND LEAVES. 
some regular geometrical forms, as cylindrical, pyramidal, 
conical, prismatic, &c., and receive corresponding names; or 
they approach in form to some well-known objects, and are 
hence termed acicular, ensiform, acinaciform, dolabriform, clavate, 
linguiform, &c. The above terms need no further description. 
In other instances, the lamina, instead of having its veins en- 
tirely connected by parenchyma, is more or less hollowed out 
in its centre, when the leaf is said to be tubular, hood-shaped, 
urn-shaped, &c. Various other singular forms are also found, 
some of which will be hereafter alluded to under the head of 
Anomalous Forms of Leaves (page 185). 
Besides the above described modifications which the blades 
of leaves present in reference to their Margins, Incision, Apex, 
Outline, and Form, they also present numerous other variations 
as regards their surface, texture, colour, &c. For an explanation 
of these we must refer to the contents generally of this Manual ; 
and more especially to that part which treats of the Appendages 
of the Epidermis. 
2. Compounp Lraves.—We have already defined a com- 
pound leaf (page 162). Its separate leaflets are subject to 
similar modifications of their margins, incision, apex, outline, 
form, texture, surface, colour, &c., as the blades of simple 
leaves, and the same terms are accordingiy used in describing 
Pie nos iGo ote 
Fig. 357, Imparipinnate or unequally pinnate leaf 
of Robinia, with spiny stipules.—— Fig, 358, 
Equally or abruptly pinnate leaf, 
them. We have therefore only now to speak of compound 
leaves as a whole, and the terms which are employed in 
describing their special modifications. We divide them into 
two heads, namely: 1. Pinnately or feather-veined Compound 
Leaves ; and 2. Palmately or radiated-veined Compound Leaves. 
1. Pinnately-veined Compound Leaves.—When a leaf present- 
