GROSS ANATOMY OF FLOWERING PLANTS. Xvil 
pinnately compound, Fig. XIII). Leaf-branches may branch again; 
thus we may have twice palmately lobed und twice palmately com- 
pound leaves, and likewise twice pinnately lobed, twice pinnately 
compound leaves, etc. etc. 
Fie. XII. Fie. XIII. 
Fia, XII.—Radiately or palmately compound leaf. 
Fig. XIII.—Pinnately compound leaf. 
Forms of Blade.—The forms of the blade may be concisely ar- 
ranged as follows (Fig. XLV): 
1. Round (orbicular), with a circular outline, or nearly so. 
2. Ovate, which is longer than broad, and has a broader base 
and a narrower apex (the reverse of this is the obvvate). When the 
base is divided into two rounded lobes the leaf is heart shaped. 
Related to the ovate is the rhombic leaf with more or less angled 
sides. Thetriangulur leaf is another modification in which the base 
is truncate (cut off). The very short and broad modification of the 
heart-shaped blade is the kidney-shaped leaf (reniform). The nar- 
row ovate is the lanceolate form, while its reverse is the oblanceo- 
late (sp:tulate). 
3. Hlliptical, which is longer than broad, has base and apex 
equal, and sides rounded. 
4. Oblong, which is two to three times longer than broad, with 
straight, parallel sides. Varieties of this are the dinear, which 
is very narrow and long: when this isrigid and sharp at the apex 
