. A class-book of botany, designed for colleges, academies, and other seminaries where science is taught ... Illustrated by a flora of the northern United States particularly New England and New York. Botany; Plants -- United States; Plants -- Canada. a. In onr description of indii-idual forms, we shall select only the most remark- able, leaving others for explanation in the Glossary. The most obvious arrangement is that which is founded upon the modes of the veining; but it should be premised that different forms of venation often give rise to the same outline. 232. Of FEATHER-VEINED leaves,
. A class-book of botany, designed for colleges, academies, and other seminaries where science is taught ... Illustrated by a flora of the northern United States particularly New England and New York. Botany; Plants -- United States; Plants -- Canada. a. In onr description of indii-idual forms, we shall select only the most remark- able, leaving others for explanation in the Glossary. The most obvious arrangement is that which is founded upon the modes of the veining; but it should be premised that different forms of venation often give rise to the same outline. 232. Of FEATHER-VEINED leaves, the following forms depend upon the length of the veins in relation to each other, and to the midrib. If the middle veins are longer than the rest, the leaf will be 1, Orbicular (roundish), as in Pyrdla FIG. 29.— Figures of featlier-veined leaves. The numbers refer to paragraplis. a, deUate leaf of Populus. 2. Elliptical (oval), as in Lespedeza prostrata; or 3. Oblong (narrow-oval). Ex. Pyrola umbellata. If the lower veins are longer than the rest, the leaf mil be 4. Ovate (egg-shaped), as in the JNIitchella repens, or 5. Lanceolate (lance-shaped), nan-ow, and tapering to each end. Ex. sweet-william. When the veins are most developed towards the summit of the leaf, it becomes 6. Obovate (inversely egg-shaped), as in the walnut; or 7. Spathulate (shaped hke a spathula), as in the daisy. Again, if the lowest veins are longest, sending oft" veinlets backwards, the leaf will be 8. Cordate (heart-shaped), hke the ovate form, wnith a hollow (sinus) at the base, as in the hlac. 9. Auriculaie, having ear-shaped lobes at the base. Ex. 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 Wood, Alphonso, 1810-1881. Boston, Crocker & Brewster
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Keywords: ., bookcentury1800, bookdecade1840, bookpublisher, booksubjectbotany
