. The elements of structural botany with special reference to the study of Canadian plants ... Plant physiology; Plant anatomy. FOHMS OF FOLIAGE-LEAVES. 113. serve to illustrate our meaning here. In the Mallow, there are several ribs of about the same size, radiat- - ing from the end of the petiole, something like the spread-out fingers of a hand. The veining in this case is therefore described as digi- tate, or radiate, or palmate. The leaflet of the Clover, on â â 'the other hand, is divided I exactly in the middle by a single rib (the mid-rib), and -from this the veins are given off on each
. The elements of structural botany with special reference to the study of Canadian plants ... Plant physiology; Plant anatomy. FOHMS OF FOLIAGE-LEAVES. 113. serve to illustrate our meaning here. In the Mallow, there are several ribs of about the same size, radiat- - ing from the end of the petiole, something like the spread-out fingers of a hand. The veining in this case is therefore described as digi- tate, or radiate, or palmate. The leaflet of the Clover, on â â 'the other hand, is divided I exactly in the middle by a single rib (the mid-rib), and -from this the veins are given off on each side, so that the veining, on the whole, presents the appearance of a feather, and is, therefore, described as pinnate fpenna, a feather). rf '- 169. Both sim^e and compound leaves exhibit these two modes of venation. Of simple pinnately-veined leaves, the, Beech, Mullein, and willow supply familiar instances. The Mallow, Maple, :Q--rape, Cur- rant, and Gooseberry have simple radiate - veined leaves. Sweet- Brier (Fig. 43), Mountain Ash, and Rose'have compound pinnate leaves, whilst those of Virginia- Creeper (Fig. 144), Horse-Chest-nut, and Hemp are Compound digitate. Fig. 143.âPalmately-lobed leaf of Maple. Fig. 141.âPalmate leaf of Virginia Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Spotton, Henry Byron, 1844-. Toronto, W. J. Gage & Co
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