. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 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. 4
. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 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. Fig. 120. Venation of the le^f of Asarum Europseum. (Ettingshansen.) Fig. 121. Venation of the leaf of Salix graiidifolia. (EttinesliauBcn.). 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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Keywords: ., bookcentury1800, bookdecade1880, booksubjectplantanatomy, bookyea
