. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. VENATION OF LEAVES. 157. 120 438. Parallel venation is of two principal kinds : (1) that in wliich. large nerves run in long curves from the base to the apex of the leaf; (2) that in which smaller nerves run generally at right an- gles from a main nerve (or midrib) to the edges of the leaf. In both these kinds of parallel venation the veins are more or less con- nected bj' means of inconspicuous cross-veinlets and b^- the anasto- mosing extremities, but some of
. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. VENATION OF LEAVES. 157. 120 438. Parallel venation is of two principal kinds : (1) that in wliich. large nerves run in long curves from the base to the apex of the leaf; (2) that in which smaller nerves run generally at right an- gles from a main nerve (or midrib) to the edges of the leaf. In both these kinds of parallel venation the veins are more or less con- nected bj' means of inconspicuous cross-veinlets and b^- the anasto- mosing extremities, but some of the veins may be free. 439. Eeticulated venation is likewise of two principal kinds : (1) palmate (Fig. 120), in which relatively large veins diverge from each other at the base of the leaf; (2) pinnate (Fig. 121), in which. 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 Goodale, George L. (George Lincoln), 1839-1923. New York [etc. ] : American Book Co.
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