The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . ryo withthe 2 cotyledons variously folded on the radicle. Albumen 0. Illust. 55,104, 192,193, 239, 336, 429, 506. • 1 2 3 A large and important Order, difficult of analysis. The Genera cannot be welldistinguished by their flowers, so nearlyalike are they in all. Their charactersare taken from the fruit and seeds. Henceit is indispensable that specimens
The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . ryo withthe 2 cotyledons variously folded on the radicle. Albumen 0. Illust. 55,104, 192,193, 239, 336, 429, 506. • 1 2 3 A large and important Order, difficult of analysis. The Genera cannot be welldistinguished by their flowers, so nearlyalike are they in all. Their charactersare taken from the fruit and seeds. Henceit is indispensable that specimens for analysis should be in fruit as well asin flower. DeCandollc arranged the Genera into Tribes according to tliefolding of the cotyledons upon the radicle. This occurs in three differentmodes, as follows: Cotyledons incumbent, when they are so bent or folded as to apply theback of one of them to the radicle, as in the seed of Capsella, fig. 1. Cotyledons accumbent, when they are so turned as to apply their edgesto the radicle, as seen in the seed of Arabis Canadensis, fig. 2. Cotyledons conduplicate, when they are not only incumbent^ as in thefirst case, but also folded on and partly embracing the radicle, as in Mus-tard, fig. 3. .... OnDEii 11.—CRUCIFER^. 35 In tlie following table we endeavor to combine with tlie systematicarrangement of DeCandolle a more practical artificial metliod : * Crucifers native, or cultivated for food. (§) * Crucifers exotic, cultivated for ornament or art. (§ §)§ Fruit a long pod, silique (§ 16S), opening by 2 valves, (a) § Fruit a short pod, silicle (§ 166), opening by 2 valves, (e) § Fruit a jointed pod, loment, partitioned across Nos. 28, 29 a Flowers cyanic.—b Seeds arranged in a double row in each cell Nos. 1, 2 —h Seeds in 1 row.—c Pods sessile on the torus Nos. 3, i, 5 —c Pods on a slender stipe No. 12 a Flowers yellow.—d Seeds flat, No. 6 —d Seeds ovate or oblong Nos. 9, 10, 11 —d Seeds globular N
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1870
