. Elements of botany. Botany; Botany. ABC Fig. 116.— The Essential Organs. A^ stamens and pistil of a tulip (the perianth removed); s, stamens ; p, pistil; B, a separate stamen, with its anther a discharging pollen; /, the filament; C, pollen-grains. as the floral envelopes. Flowers which have the essential organs are called perfect flowers. They may therefore be perfect without being complete. In cases where the perianth contains only one row of parts, it is assumed that the petals are lacking. Such imperfect flowers are said to be apetalous, Fig. 117. 176. Regular and Symmetrical Flowers. —
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. Elements of botany. Botany; Botany. ABC Fig. 116.— The Essential Organs. A^ stamens and pistil of a tulip (the perianth removed); s, stamens ; p, pistil; B, a separate stamen, with its anther a discharging pollen; /, the filament; C, pollen-grains. as the floral envelopes. Flowers which have the essential organs are called perfect flowers. They may therefore be perfect without being complete. In cases where the perianth contains only one row of parts, it is assumed that the petals are lacking. Such imperfect flowers are said to be apetalous, Fig. 117. 176. Regular and 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. 118. Such flowers as that of the violet, the monkshood, the nasturtium, or the laburnum. Fig. 119, are irregular. Symmetrical flowers are those whose calyx, corolla, circle of stamens and set of carpels consists each of the same number of parts, or in which the. Fig. 117.—Apetalous Flower of (European) Wild Ginger.. 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 work.. Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn