. The elements of botany for beginners and for schools. Plants. 56 LEAVES. [SECTION 7 leaf compound. Here, using the Latin form, the leaf is said to be bisected, trisected (Fig. 155), etc., according to the number of the divisions. 141. The Mode of Lobing or Division corresponds to that of the veining, whether pinnately veined or palmately veined. In the former the notches or incisions, or sinuses, coming between the principal veins or ribs are directed toward the midrib : in the latter they are directed toward the apex of the petiole ; as the figures show. 142. So degree and mode of division
. The elements of botany for beginners and for schools. Plants. 56 LEAVES. [SECTION 7 leaf compound. Here, using the Latin form, the leaf is said to be bisected, trisected (Fig. 155), etc., according to the number of the divisions. 141. The Mode of Lobing or Division corresponds to that of the veining, whether pinnately veined or palmately veined. In the former the notches or incisions, or sinuses, coming between the principal veins or ribs are directed toward the midrib : in the latter they are directed toward the apex of the petiole ; as the figures show. 142. So degree and mode of division may be tersely expressed in brief phrases. Thus, in the four upper figures of pinnately veined leaves, the first is said to be pinnately lobed (in the special sense), the second pinnately cleft (or pinna'tifid in Latin form), the third pinnately parted, the fourth pinnately divided, or pinnatisected. 143. Correspondingly in the lower row, of palmately veined leaves, the first is palmately lobed, the second palmately cleft, the third palmately parted, the fourth palmately divided. Or, in other language of the same meaning (but now less commonly employed), they are said to be digitately lobed, cleft, parted, or divided. 144. The number of the divisions or lobes may come into the phrase. Thus in the four last named figures the leaves are respectively palmately. three-lobed, three-cleft (or trifid), three-parted, three-divided, or better (in Latin form), trisected. And so for higher numbers, &sfve-lobed,fve-cleft, Fig. 148, pinnately lobed; 149, pinnately cleft; 150, pinnately parted; 151, pinnately divided, leaves. Fig. 152, palmately three-lobed ; 153, palmately three-cleft; 154, palmately three-parted; 155, palmately three-divided or trisected, 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 Gray
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectplants, bookyear1887
