. The essentials of botany. Botany. XXX BOTANY. longer than the other two, the androecium is said to be didyna- mous (Fig. XXIV); Pentandrous, of five stamens; Memndrous, of six stamens; when four are longer than the re- maining two, the androecium is said to be tetradynamous. (Fig. XXV.) Other terms of similar construction are used, as heptandrom, seven stamens; octandrous, eight; enneandrom, nine; decandrous, ten; dodeeandrous, twelve; a,Ddpolyandrous, many or an indefinite number of Fio. XXXV. FiO. 23T. Fia XrVI. Fig. XXrV.âTetrandrous flower; stamens didynamous. Fig. XXV.âHexandr
. The essentials of botany. Botany. XXX BOTANY. longer than the other two, the androecium is said to be didyna- mous (Fig. XXIV); Pentandrous, of five stamens; Memndrous, of six stamens; when four are longer than the re- maining two, the androecium is said to be tetradynamous. (Fig. XXV.) Other terms of similar construction are used, as heptandrom, seven stamens; octandrous, eight; enneandrom, nine; decandrous, ten; dodeeandrous, twelve; a,Ddpolyandrous, many or an indefinite number of Fio. XXXV. FiO. 23T. Fia XrVI. Fig. XXrV.âTetrandrous flower; stamens didynamous. Fig. XXV.âHexandrous flower; stamens tetradynamous. Fio. XXVI.âBicyolic androecium. The stamens may be in a single whorl (monocyclic), in which case, if agreeing in number with the rest of the flower, the an- dioscium is said to be isostemonous; they are often in two whorls Cpicyclic, Fig. XXVI), and when each whorl agrees with the numerical plan of the flower, the andrcecium is diplostemonous. Union of Stamens.âThe various kinds of union require the use of special terms. "When there is a union of the filaments the an- droecium is Monadel/plious, when the stamens are united into one set (Fig. XXVII); Diadelphous, when united into two sets (Fig. XXVIII); Triadelphous, when united into three sets, etc. (Fig. XXIX) "When there is a union of the anthers the androecium is syngene- Bious or synantherous. Adnation of Stamens.âThe stamens may be adnate to the petals, â when they are epipetalom; in some cases they are iidnate to the. 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt and company, ;
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