. The elements of botany for beginners and for schools. Botany. the ovule curves into a kidney-shaped outline, so bringing the orifice down close to the base or chalaza; as in Fig. 345. Amphitropous or Half-Inverted, Fig. 346. Here the forming ovule, instead of curving perceptibly, keeps its axis nearly straight, and, as it grows, turns round upon its base so far as to become transverse to its funiculus, and adnate to its upper part for some distance. Therefore in this case the attachment of the funiculus or stalk is about the middle, the chal- aza is at one end, the orifice at the other. Anat
. The elements of botany for beginners and for schools. Botany. the ovule curves into a kidney-shaped outline, so bringing the orifice down close to the base or chalaza; as in Fig. 345. Amphitropous or Half-Inverted, Fig. 346. Here the forming ovule, instead of curving perceptibly, keeps its axis nearly straight, and, as it grows, turns round upon its base so far as to become transverse to its funiculus, and adnate to its upper part for some distance. Therefore in this case the attachment of the funiculus or stalk is about the middle, the chal- aza is at one end, the orifice at the other. Anatropoiis or Inverted, as in Fig. 347, the com- monest kind, so called because in its growth it has as it were turned over upon its stalk, to which it has continued adnate. The organic base, or chalaza, thus becomes the apparent summit, and the. Fig. 344. Orthotropous ovule of Buckwheat: c, hilum and chalaza; /, orifice. Fig. 345. Campylotropous ovule of a Chickweed: c, hilum and chalaza; /, orifice. Fig. 346. Amphitropous ovule of Mallow:/, orifice; h, hihun; r, rhaphe; c, chalaza. Fig. 347. Anatropous ovule of a Violet; the parts lettered as iu the last. Fig. 348-350. Three early stages in the growth of ovule of a Magnolia, showing the forming outer and inner coats, which, even in the later figure have not yet completely enclosed the nucleus ; 351, further advanced, and 352, completely ana- tropous ovule. Fig. 353. Longitudinal section, and 354, transverse section of 352. Fig. 355. Same as 353, enlarged, showing the parts in section : a, outer coat ; 5, inner coat; c, nucleus; d, 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 Gray, Asa, 1810-1888. New York American Book Co
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Keywords: ., bookpublishernewyorkamericanboo, booksubjectbotany, bookyear1887
