. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. 150 PARTICULAR FORMS OF FLOWERS ovary) are borne at the base of the spadix, and the staminate flowers (each of a few anthers) are above them. The ovaries ripen into red berries. In the skunk cabbage all the flowers are perfect and have four sepals. The common calla of greenhouses is a good example of this type of inflorescence. 303. Compositous Flowers.—The head (anthodium) or so-called "flower" of sunflower and whiteweed and daisy (Figs. 188, 189, 200), thistle, aster (Fig. 252),
. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. 150 PARTICULAR FORMS OF FLOWERS ovary) are borne at the base of the spadix, and the staminate flowers (each of a few anthers) are above them. The ovaries ripen into red berries. In the skunk cabbage all the flowers are perfect and have four sepals. The common calla of greenhouses is a good example of this type of inflorescence. 303. Compositous Flowers.—The head (anthodium) or so-called "flower" of sunflower and whiteweed and daisy (Figs. 188, 189, 200), thistle, aster (Fig. 252), dandelion, daisy, chrysanthemum, goldenrod, is composed of several or many little flowers, or florets. These florets are inclosed in a more or less dense and usually green involucre. In the thistle (Fig. 253) this involucre is prickly. A longi- tudinal section (Fig. 254) discloses the florets, all attached at bottom to a common torus, and densely packed in the involucre. The pink tips of these florets constitute the showy part of the head. 304. Each floret of the thistle (Fig. 255) is a complete flower. At a is the ovary. At b is a much-divided plumy calyx, known as the pappus. The corolla is long- tubed, rising above the pappus, and is enlarged and 5-lobed at the top, c. The style projects at e. The five anthers are united about the style in a ring at d. Such anthers are said to be syngenesious. 305. These are the various parts of the florets of the Com- positae, sometimes known as the Sunflower family. In some cases the pappus is in the form of barbs, bristles or scales, and sometimes it is wanting. The pappus, as we shall see later, assists in distributing the seed. Often the florets are not all alike. The corolla of those in the outer circles may be. 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 Bail
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1913
