. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 50 ORGANOGRAPHY. monadelphous (Gr. monos, one; adelphos, brotherhood). If they are united into two sets, as in Dicentra, they are diadelphous; if in three sets, triadel- phous ; and so on. When the anthers are united into a tube, as iu the Composite family (Sunflower, Dandelion, etc.), they ^^^ are said to be syngenesious (Gr. syn, with; genesis, birth). If a transverse section of the anther be made (Fig. 116),


. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 50 ORGANOGRAPHY. monadelphous (Gr. monos, one; adelphos, brotherhood). If they are united into two sets, as in Dicentra, they are diadelphous; if in three sets, triadel- phous ; and so on. When the anthers are united into a tube, as iu the Composite family (Sunflower, Dandelion, etc.), they ^^^ are said to be syngenesious (Gr. syn, with; genesis, birth). If a transverse section of the anther be made (Fig. 116), two or four cavities, called cells, will be seen, and these are filled with a yellow dust, which, oa examination with the microscope, proves to be small, round bodies, called pollen (Fig. 117). Each pollen grain has two coats: the outer, thicker and often orna- mented ; the inner, more delicate and elastic. 62. The opening of the anther at maturity, for the discharge of the pollen, is called dehis- cence. This commonly takes place by a line along the whole length of each cell (Fig. 118). Sassafras, Barberry, etc., the opening is by a lid or valve (Fig. 119). In the Azalea, Pyrola, etc., the pollen escapes by a pore at the top of the anther (Fig. 120). As regards the attachment of the anther to the filament, it may be innate, or inserted by its base on the top of the filament (as in Fig. 121); or adnate, when attached by one face its whole length (Fig. 122). It is ver- satile when inserted near its middle point to the top of the filament, lis 119 120 121 122 123 so that it may swing Fig. 116. Transverse section of an anther. Fig. IIT. A pollen grain. Figs. 118- 120. Dehiscence of anthers : by splitting longitudinally ; by lids or valves ; bypores. Figs. 121-123. Attachment of anthers: 121. Innate; 122. Adnate; 12a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of


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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1883