. Introduction to structural and systematic botany, and vegetable physiology. Botany. 396 ILLUSTRATIONS OF THE NATURAL ORDERS. stipules, tlie ovary is sessile, the sepals and petals (imbricated in lestivation) are nearly or quite distinct; the petals destitute of claws; and tlie stamens are inserted into the margin of a small hypogynous disk, wliich, however, occasionally coheres with the base of the calyx, and becomes perigynous. â Ex. Stellaria, Arenaria, &c. (Chick- weeds). Some are W III ^ ornamental; others, ~ â ' such as the common Chickweed, are in- significant weeds. 766. Subord. I
. Introduction to structural and systematic botany, and vegetable physiology. Botany. 396 ILLUSTRATIONS OF THE NATURAL ORDERS. stipules, tlie ovary is sessile, the sepals and petals (imbricated in lestivation) are nearly or quite distinct; the petals destitute of claws; and tlie stamens are inserted into the margin of a small hypogynous disk, wliich, however, occasionally coheres with the base of the calyx, and becomes perigynous. â Ex. Stellaria, Arenaria, &c. (Chick- weeds). Some are W III ^ ornamental; others, ~ â ' such as the common Chickweed, are in- significant weeds. 766. Subord. Illc- cebrea; (Knotwort Family) ; differing from the last main- ly in- having sca- rious stipules ; the sepals often united below ; the petals often wanting or ru- dimentary ; the sta- mens manifestly pe- rigynous ; and the fruit more commonly a one-seeded utricle â Ex. Paronychia and Anychia. Spergula has conspicuous petals, and many-seeded capsules ; and so differs from Alsineoa only in its stipules. Insignificant weeds. 7C7. Subord. ScleranthCffi {Knawd Family) is like the last, only there are no stipules. â Ex. Scleranthus. 768. Subord. MollUgincfB <yGarpet-weed Family) is apetalous with- out stipules, and has the stamens alternate with the sepals when of the same number ; thus effecting a transition to 769. Ord. PortulacacCEB {Purslane Family). Succulent or fleshy lierbs, with entire exstipulate leaves and usually ephemeral flowers. Calyx mostly of two or three sepals, sometimes cohering with the base of the ovary. Petals five, or rarely more numerous, sometimes none. Stamens variable in number, but when equal to the petals situated opposite them. Styles two to eight, united below. Capsule. FIG. 724. Moehringia lateriflora. 725 A magnified flower. 726. Magnified portion of a Beecl, showing the emhryo coiled into a ring around the albumen. 727. Vertical section of a pistil of Please note that these images are extracted from scanned page images that may h
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1850, booksubjectbotany
