. Botany for young people and common schools. Botany. 50 HOW PLANTS GROW. number of projecting parts, or lobes, may be expressed by saying two-lobed, three* lobed (Fig. 121), &c, according to their number. Or, more particularly, a leaf is Lobed ; when the pieces are roundish, or the incisions open or blunt, as in Fig. 120, 121; and Cleft; when cut about half-way down, with sharp and narrow incisions, as in Fig. 122, 123 ; and so two-cleft, three-cleft, five-cleft, &c, according to the number. Parted; when the cutting extends almost through, as in Fig. 124,125. And we say two-parted, th
. Botany for young people and common schools. Botany. 50 HOW PLANTS GROW. number of projecting parts, or lobes, may be expressed by saying two-lobed, three* lobed (Fig. 121), &c, according to their number. Or, more particularly, a leaf is Lobed ; when the pieces are roundish, or the incisions open or blunt, as in Fig. 120, 121; and Cleft; when cut about half-way down, with sharp and narrow incisions, as in Fig. 122, 123 ; and so two-cleft, three-cleft, five-cleft, &c, according to the number. Parted; when the cutting extends almost through, as in Fig. 124,125. And we say two-parted, three-parted, &c, to express the number of the parts. Divided ; when the divisions go through to the base of the leaf (as in Fig. 127), or to the midrib (as in Fig. 126), which cuts up the blade into separate pieces, or nearly so. 122 124 126 Pinnately Palmately. 127 Divided. 140. As the cutting is always between the veins or ribs, and not across them, the arrangement of the lobes depends upon the kind of veining. Feather-veined leaves have the incisions all running in towards the midrib (as in the upper row of figures), because the principal veins all spring from the midrib; while radiate or palmately veined leaves have them all running towards the base of the blade, where the ribs all spring from the footstalk, as in the lower row of figures. So those of. 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, Asa, 1810-1888. New York, Ivison, Phinney, Blakeman & co. ; Chicago, S. C. Griggs & co.
Size: 1799px × 1389px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, booksubjectbotany, bookyear1868
