. The elements of botany for beginners and for schools. Plants. the like ; while parallel-veined or nerved leaves belong to plants with one cotyledon or true seed-leaf; such as the Iris (Fig. 59), and Indian Corn (Fig. 70). So that a mere glance at the leaves generally tells what the structure of the embryo is, and refers the plant to one or the other of these two grand classes, — which is a great convenience. For when plants differ from each other in some one important respect, they usually dilfer corres- pondingly in other respects also. 130. Parallel-veined leaves are of two sorts, —one kin
. The elements of botany for beginners and for schools. Plants. the like ; while parallel-veined or nerved leaves belong to plants with one cotyledon or true seed-leaf; such as the Iris (Fig. 59), and Indian Corn (Fig. 70). So that a mere glance at the leaves generally tells what the structure of the embryo is, and refers the plant to one or the other of these two grand classes, — which is a great convenience. For when plants differ from each other in some one important respect, they usually dilfer corres- pondingly in other respects also. 130. Parallel-veined leaves are of two sorts, —one kind, and the com- monest, having the ribs or nerves all running from the base to the point of the leaf, as in the examples already given ; while in another kind they run from a midrib to the margin, as in the common Pickerel-weed of our ponds, in the Banana, in Calla (Fig. 114), and many similar plants of warm climates. 131. Netted-veined leaves are also of two sorts, as in the examples al- ready referred to. In one ease the veins all rise from a single rib (the midrib), as in Fig. LIS, 116-127. Such leaves are called Feather-veined or Venni-veined, i. e. Pinnateljf-veined; both terms meaning the same thing, namely, thai the veins are arranged on the sides of the rib like the plume of a feather on each side of the shaft. Fig. 113. A (|>;irallel-veined) leaf of the Lily of the Valley. 114. One of the Calla 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 : American Book Company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectplants, bookyear1887
