. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. OEUOIFEEjE. 435 (fig. 315, p. 204). Stamens 6, tetradynamous (figs. 372, p. 226; 672); two shorter solitary (fig. 672 e) opposite the lateral sepals, occasion- ally toothed; four longer (fig. 672 «"), opposite the anterior and pos- terior sepals, generally free, sometimes partially united and furnished with a tooth on the inside ; anthers bilocular, introrse (fig. 671) j (in Megacarpma polyandra the stamens are numerous). Torus with green glands between the petal
. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. OEUOIFEEjE. 435 (fig. 315, p. 204). Stamens 6, tetradynamous (figs. 372, p. 226; 672); two shorter solitary (fig. 672 e) opposite the lateral sepals, occasion- ally toothed; four longer (fig. 672 «"), opposite the anterior and pos- terior sepals, generally free, sometimes partially united and furnished with a tooth on the inside ; anthers bilocular, introrse (fig. 671) j (in Megacarpma polyandra the stamens are numerous). Torus with green glands between the petals and stamens and ovary (fig. 672 -g). Ovary superior, with parietal placentas, which meet in the middle, forming a spurious dissepiment or replum (fig. 673 c); stigmas 2, opposite the placentas, or anterior and posterior (fig. 552 s, p. 306). Fruit a sUiqua (figs. 674, 675), or a silicula, rarely 1-celled and indehiscent, usually spuriously 2-celled and dehiscing by two valves, which sepa- rate from the replum (figs. 552 r, p. 306 ; 675), one- or many-seeded. Seeds campylotropous (figs. 455, p. 255; 620, p. 342), pendulous, attached in a siagle row by a funiculus to each side of the pla- centas (fig. 676) ; perisperm none; embryo with the radicle folded upon the cotyledons which are next the placenta (figs. 620, p. 342 ; 677 r).âHerbaceous plants seldom under- shrubs, with alternate leaves, and yellow or white, rarely purple, flowers, without bracts. This order is well distinguished by having tetradynamous stamens. Most of the plants belonging to the order are European. The species, however, are found scattered all over the world. Authors enumerate 172 genera, including 1700 species. ExamplesâDraba, Lepidium, Isatis, Brassica, Sinapis, Bunias, Senebiera, Schizopetalon, Pringlea, Megacarpsea. The order has been subdivided into sections, according to the mode in which the radicle of the embryo is folded on the cotyledons, as well as according to the nature of the fruit. The
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