. A class-book of botany; designed for colleges, academies, and other seminaries ... illustrated by a flora of the northern, middle, and western states; particularly of the United States north of the capitol, lat. 38 3/4 o. Botany; Plants -- United States; Plants -- Canada. VEINS. 87 a. In our description of individual forms, we shall select only the most remark- able, leaving others for explanation in the Glossary. The most obvious arrangement is that wliich is founded upon the modes of the veining; but it should be premised that diiferent forms of venation often give rise to the same outline
. A class-book of botany; designed for colleges, academies, and other seminaries ... illustrated by a flora of the northern, middle, and western states; particularly of the United States north of the capitol, lat. 38 3/4 o. Botany; Plants -- United States; Plants -- Canada. VEINS. 87 a. In our description of individual forms, we shall select only the most remark- able, leaving others for explanation in the Glossary. The most obvious arrangement is that wliich is founded upon the modes of the veining; but it should be premised that diiferent forms of venation often give rise to the same outline. 232. Of FEATHER-VEINED Icaves, the following forms depend on the length of the veinlets in relation to each other, and to the mill vein. If the middle veinlets ai-e longer than the rest, the leaf will be 1, Orbicular (roundish), as in Pyrola FIG. 29. — Figures of feather-veined leaves. The numbers refer to paragraplis. a, deltate leaf of Populus. 2. Elliptical (oval), as in Lespedeza prostrata; or 3. Oblong (narrow-oval). Ex. Arenaria lateriflora. If the lower veinlets are longer than the rest,the leaf will be 4. Ovate (egg-shaped), as in the Mitchella repens, or 5. Lanceolate (lance-shaped), narrow, 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. Spathulatc (shaped like a spathula), as in the daisy. Again, if the lowest veinlets are longest, sending off veinulets backwards, the leaf will be 8. Cordate (heart-shaped), hke the ovate fcirm, with a hollow (sinus) at the base, as in the lilac. 9. Aiiriculate, having ear-shaped lobes at the base. Ex. sage. 8*. 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
