. Foundations of botany. Botany; Botany. 198 FOUNDATIONS OF BOTANY greatly modified leaf (Sect. 222), adapted into a seed- bearing organ. Such a pistil may be one-seeded, as in Fig. 166, or several-seeded, as in the diagrammatic one (Fig. 150); it is called a carpel. The calyx and corolla are also known as the floral envelopes. Flowers which have the essential organs are called perfect flowers. They may, therefore, be perfect without being complete. Incomplete flowers with only one row of parts in the perianth are said to be apetalous (Fig. 139). 209. Symmetrical Flowers. — A flowe
. Foundations of botany. Botany; Botany. 198 FOUNDATIONS OF BOTANY greatly modified leaf (Sect. 222), adapted into a seed- bearing organ. Such a pistil may be one-seeded, as in Fig. 166, or several-seeded, as in the diagrammatic one (Fig. 150); it is called a carpel. The calyx and corolla are also known as the floral envelopes. Flowers which have the essential organs are called perfect flowers. They may, therefore, be perfect without being complete. Incomplete flowers with only one row of parts in the perianth are said to be apetalous (Fig. 139). 209. Symmetrical Flowers. — A flower is regular if all the parts of the same set or circle are alike in size and shape, as in the stonecrop (Fig. 140). Such flowers as that of the violet, the monkshood, and the sweet pea (Fig. 141) are irregular. Symmetrical flowers are those whose calyx, corolla, circle of stamens, and set of carpels consist each of the same number of parts, or in which the number in every case is a multiple of the smallest number found in any set. The stonecrop is. Fig. 139.— Apetal- ous Flower of (European) Wild 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 Bergen, Joseph Y. (Joseph Young), 1851-1917; Eastwood, Alice, 1859-1953. Boston, Ginn & Co.
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