. 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. •ESTIVATION. 246 O o ^^ o 251 250 249 244-251, Modes of aestivation. 260, Petals of the wall-flower. > 389. Contorted .estivation, where each piece overlaps its neigh- bor, all in the same direction, appearing as if twisted together, as in Phlox, flax, oleander. (247, 252.) 390. Imbricated aestivation (imbrex, a tile) is a term restricted to those modes in which one or more of the petals or sepals is wholly outside, overla
. 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. •ESTIVATION. 246 O o ^^ o 251 250 249 244-251, Modes of aestivation. 260, Petals of the wall-flower. > 389. Contorted .estivation, where each piece overlaps its neigh- bor, all in the same direction, appearing as if twisted together, as in Phlox, flax, oleander. (247, 252.) 390. Imbricated aestivation (imbrex, a tile) is a term restricted to those modes in which one or more of the petals or sepals is wholly outside, overlapping two others by both its margins. This kind of aestivation naturally results from the spiral arrangements so common in phyllotaxy, while the valvate and contorted seem identified with the opposite or whorled arrange- ment. The principal varieties are 391. The quincuntial, consisting of five leaves, two of which are wholly without, two wholly within, and one partly both, or one margin out, the other in, as in the rose family (248). This accompa- nies the two-fifths plan in phyllotaxy, and corresponds precisely with it, each quin- cunx being in, fact a cycU with its internodes suppress* ed. (§ 232.) 392. The triquetrous, consisting of three leaves in 262, Gossypinm l'«l'»°™™. *!» cotton ;"Petals each set. One of whicli is out- side, one inside, and the third partly both, as in tulip, Erythronium, according to the one-third plan in 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 & Burr
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