Text-book of structural and physiological botany . Fig. 175. —Runclnate leaf Fig. 176.—Lyrate leaf of Fig. 177. — Heteromorphic of the dandelion. the white mustard, Bras- leaves of the water crowtoot, sica alba. Raitunctdus aquatilis ; the floating leaves trilobed, the submerged leaves laciniate. Still broader and shallower, the incisions themselves beingalso rounded off. According to the number of the divisions,the leaf is trifid^ trilobed (^\g. 179), Jive-lohed^ &c., or thelatter is usually called palmatilobed. Compound leaves are classed under two principal heads,the digitate di\-\di ih^pin
Text-book of structural and physiological botany . Fig. 175. —Runclnate leaf Fig. 176.—Lyrate leaf of Fig. 177. — Heteromorphic of the dandelion. the white mustard, Bras- leaves of the water crowtoot, sica alba. Raitunctdus aquatilis ; the floating leaves trilobed, the submerged leaves laciniate. Still broader and shallower, the incisions themselves beingalso rounded off. According to the number of the divisions,the leaf is trifid^ trilobed (^\g. 179), Jive-lohed^ &c., or thelatter is usually called palmatilobed. Compound leaves are classed under two principal heads,the digitate di\-\di ih^pinnate. In the former, several leaflets—3, 5, 7, or less often 4—spring from the apex of the commonpetiole. The most common number is 3, as in the clover(Fig. 182, p. 102), when the leaf is said to be ternate or The External Form of Plants, lOI trifoliolate. When the petiole divides at its apex into twomain divisions, each of which bears several leaflets, it ispedate (Fig. 183). The a pinnate leaf has its leaf j 1 lets arranged on eac
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyorkjwileysons
