. Plant life, considered with special references to form and function. Plant physiology. Fig, 148. Fig. 149. Fig. 147.—A palnuitely branclied () leaf of horse chestnut. About otie-tiftli natural size.—Alter Bessey. Fig. 14S.—A palmately branched (compound) leaf.—After Bessey. Fig. 14CJ.—Leaflets of maidenhair fern showing dichotomuus branching of veinlets, which end free. Natural size.—After Ettingshausen. again be branched in various ways. Such a leaf is said to be pinnately veined (iigs. 13S, 151, 153). Or (2) from the top of the petiole several large ribs of almost equal strength
. Plant life, considered with special references to form and function. Plant physiology. Fig, 148. Fig. 149. Fig. 147.—A palnuitely branclied () leaf of horse chestnut. About otie-tiftli natural size.—Alter Bessey. Fig. 14S.—A palmately branched (compound) leaf.—After Bessey. Fig. 14CJ.—Leaflets of maidenhair fern showing dichotomuus branching of veinlets, which end free. Natural size.—After Ettingshausen. again be branched in various ways. Such a leaf is said to be pinnately veined (iigs. 13S, 151, 153). Or (2) from the top of the petiole several large ribs of almost equal strength may be given off. Such venation is pahnate (figs. 150, 152). These may be parallel (fig. 150) or radiate (fig. 152). The distribution of the small ^'ei^s or nerves shows three types. They may either (1) connect with each other so as to form an irregular meshed network (fig. 151); or, (2) leav- ing a rib nearly at right angles, they may run parallel with each otlier to join another large vein ; or (3) they may leave. 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 Barnes, Charles Reid, 1858-1910. New York, H. Holt & company
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