. Botany of the southern states. In two parts. Part I. Structural and physiological botany and vegetable products. Part II. Descriptions of southern plants. Arranged on the natural system. Preceded by a Linnaean and a dichotomous analysis. Plants. LEAVES. 43 (4.) Equitant; when the loaves are folded around each other, with the midrib of one corresponding to the margin of the one contiguous to it, as in the Iris. (5/) Obvolute; when one margin of a leaf incloses the margin of a leaf opposite, the remaining margin of each being outward, as in the Sage. (6.) Plaited; folded like a fan, as in the
. Botany of the southern states. In two parts. Part I. Structural and physiological botany and vegetable products. Part II. Descriptions of southern plants. Arranged on the natural system. Preceded by a Linnaean and a dichotomous analysis. Plants. LEAVES. 43 (4.) Equitant; when the loaves are folded around each other, with the midrib of one corresponding to the margin of the one contiguous to it, as in the Iris. (5/) Obvolute; when one margin of a leaf incloses the margin of a leaf opposite, the remaining margin of each being outward, as in the Sage. (6.) Plaited; folded like a fan, as in the Vine. (7.) Involute ; when the margins of the leaves roll inward, as in the Violet. (8.) Revolute ; where the margins are rolled outward, as in the Willow. (9.) Convolute; where one leaf is rolled within another, as in the Cherry. (10.) Circinate ; where it is rolled from the apex downward, as in the Sundew (Drosera). Section 6.—Leaves. 78t Leaves are organs arising at regular intervals along the main axis or branches, having their origin at a node. The spaces of the stem between the leaves are called They are expansions of the parenchymous portion of the bark, with the spiral vessels and woody fiber of the medullary sheath traversing them. The spiral vessels and woody fiber connect the leaf with the center of the stem, and these vessels are expanded on the upper surface of the leaf. The cellular tissue, liber, and lactiferous vessels connect it with the bark, and are expanded on the under surface of the leaf. A leaf consists gen- erally of a petiole and lamina. The petiole, which is the support of the lamina (Fig. 38, a), consists of cellular and vascular tissue, and woody fiber. The vascular tissue and woody fiber are formed into bundles, the spiral vessels occupying the center of the bundle, and the woody fiber forming a sheath around them. The bundles are imbedded in the cellular tissue, as may easily be seen by observing a transverse section of the petiole o
Size: 1346px × 1856px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, bookpublisher, booksubjectplants
