The elements of botany for The elements of botany for beginners and for schools elementsofbotany00grayuoft Year: [1887] 56 LEAVES. [SECTION 7 leaf compound. Here, using the Latin form, the leaf is said to be bisected, trisected (Pig. 155), etc., according to the number of the divisions. 141. The Mode of Lobing or Division corresponds to that of the veining, whether f innately veined or pal^nately veitted. In the former the notches or incisions, or simiseif, coming between the principal veins or ribs are directed toward the midrib : in the latter tliey are directed toward the apex of the petio
The elements of botany for The elements of botany for beginners and for schools elementsofbotany00grayuoft Year: [1887] 56 LEAVES. [SECTION 7 leaf compound. Here, using the Latin form, the leaf is said to be bisected, trisected (Pig. 155), etc., according to the number of the divisions. 141. The Mode of Lobing or Division corresponds to that of the veining, whether f innately veined or pal^nately veitted. In the former the notches or incisions, or simiseif, coming between the principal veins or ribs are directed toward the midrib : in the latter tliey 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 tbe four upper figures of pinnately veined leaves, tlie first is said to be pinnately lobed (in the special sense), the second ^innately cleft {or pinnatijid in Latin form), the third pinnately parted, the fourlli 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-lohed, three-cleft (or trifid), three-parted, three-divided, or better (in Latin form), trisected. And so for higher numbers, &?, five-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 tliree-parted; 155, palmately three-divided or trisected, leaves.
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