Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . 390 ILLUSTRATIONS OF THE NATURAL ORDERS. peculiar pod. The peculiarity of the stamens is explained, andthe singular symmetry of the flower illustrated, on p. 243. Allthese plants have a peculiar volatile acridity (and often an ethe-real oil, which abounds in sulphur) dispersed through every part,from which they derive their peculiar odor and sharp taste, andtheir stimulant, rubefacient, and antiscorbutic properties. The
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . 390 ILLUSTRATIONS OF THE NATURAL ORDERS. peculiar pod. The peculiarity of the stamens is explained, andthe singular symmetry of the flower illustrated, on p. 243. Allthese plants have a peculiar volatile acridity (and often an ethe-real oil, which abounds in sulphur) dispersed through every part,from which they derive their peculiar odor and sharp taste, andtheir stimulant, rubefacient, and antiscorbutic properties. The rootsof some perennial species, such as the Horseradish, or the seeds ofannual species, as the Mustard, are used as condiments. In somecultivated plants, the acrid principle is dispersed among abundanceof saccharine and mucilaginous matter, affording wholesome food;as the root of the Turnip and Radish, and the leaves and stalks. of the Cabbage and Cauliflower. None are really poisonousplants, although some are very acrid. Several species are in FIG. 096. A Cruciferous flower. 697. The same, with the calyx and corolla removed, show-ing the tetradynamous stamens. 698. Siliquts of Arabis Canadensis ; one of them with one ofthe valves detached, showing the seeds lying on the false partition; the other valve also fallingaway. 699. A magnified cross-section of one of the winged seeds, showing the embryo withthe radicle applied to the edge of the cotyledons (cotyledons accambent). 700. The embryodetached. 701. The raceme of Draba verna, in fruit. 702. A cross-section of one of the sili-cles, magnified, exhibiting the parietal insertion of the seeds, and the false partition. 703. Asilicle of Shepherds Purse (Capsella Bursa Pastoris). 704. The same, with one of the boat-shaped valves removed, presenting a longitudinal view of the narrow partition, &c. 705. Amagnified cross-section of one of the seeds, showing the
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
