. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. m THE PLAN OP THB FLOWER. 2r0 469. 268, Pistillate flowcf of Balm-of-Gilead. 269, Stnmlnate. 270, Diplooliniiiin Evansianum. a, 6taminat« ; &, pistillate. 422. A NEUTRAL PLOWEE is a perianth or calyx only, having neither stamens nor pistiJs. Such are the ray-flowers of many of the Compositse, and of the cymes of Hydrangea, high cranberry, etc., which in cultivation may all become neutral, as in the saow-ball 271 423. Uns
. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. m THE PLAN OP THB FLOWER. 2r0 469. 268, Pistillate flowcf of Balm-of-Gilead. 269, Stnmlnate. 270, Diplooliniiiin Evansianum. a, 6taminat« ; &, pistillate. 422. A NEUTRAL PLOWEE is a perianth or calyx only, having neither stamens nor pistiJs. Such are the ray-flowers of many of the Compositse, and of the cymes of Hydrangea, high cranberry, etc., which in cultivation may all become neutral, as in the saow-ball 271 423. Unsymmetbical flow- ers. The term symmetrj-, as used in botany, refers to number only, A flower becomes unsymmetrical by the partial development of any set or circle in respect to the num- ber of its organs. The mustard family affords a good example. 424. Flowers of the crdci- FEES. The flowers of mustard, cress, etc, are understood to bo 4-merons (V). The sepals are four, petals four, but the stamens are six and the styles but two. The stamens are arranged in two circles, having two of those in the outer circle suppressed or reduced to mere glands. Two of the car- pels are also suppressed. (256.) 425. In THE MINT FAMILY and the figworts one or three of the stamens is generally abortive. Here, while the flowers aro -s/, the stamens are four in some spe- cies and only two in others. Tlie missing stamens, however, often appear in the guise of slender processes—the rudiments of sta- mens—proving in an interesting manner tne natural tendency to symmetiy. 426. Other examples. In the V flowers of poppy, the sepais are but two; in V spring-beauty they are but two; in both cases too few for gymmelrs. In lark-. 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. New York : A. S. Barnes &
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