. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. foums 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 the other hand, is divided exactly in the middle by a single r
. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. foums 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 the other hand, is divided exactly in the middle by a single rib (the mid-rib), and. Fig. 143. from this the veins are given off on each side, so that the veining, on the whole, presents thj^ appearance of a feather, and is, therefore, described as pinnate ^penna^ a feather). 169. Both simple 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, Grape, 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- Fig. 144. Creeper (Fig. 144), Horse-Chest-nut, and Hemp are compound digitate. ' —.—-—-« Fig. 143.—Palmately-lobed leaf of Maple. Fig. 144.—Palmate 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, H. B. (Henry Byron), 1844-1933. Toronto : W. J. Gage
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, booksubjectpl
