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Sometimes the leaflets themselves are compound, and the whole leaf is then said to be bi-compound or twice-compound (Fig. 90). Some leaves are three-compound, four-compound, or five-compound. Decompound is a general term to express any degree of compounding beyond twice-compound.
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Fig. 94.—Digitately Compound Leaf of Raspberry.
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Fig. 95.—Poison Ivy. Leaf and Fruit.
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Fig. 96.—Lobed Leaf of Sugar Maple.
Leaves that are not divided as far as to the midrib are said to be:
lobed, if the openings or sinuses are not more than half the depth of the blade (Fig. 96);
cleft, if the sinuses are deeper than the middle;
