. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by Hooker. Botany. 17(i. Hooded Columbine, showing one series of a
. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by Hooker. Botany. 17(i. Hooded Columbine, showing one series of aatbei's transformed and connected together. delicate, and their colour more brilliant, but their claw, Umb, and nerves, and their usually flat shape, all reveal their foliar nature. The third whorl, or andrcecium, bears much analogy to the second ; the relative position of the stamens and petals is always the same, and these sometimes present an insensible transition from one to the other; as in semi-double flowers, where some of the stamens are changed into petals ; in partially double flowers, where all the stamens are so changed; and in full double flowers, where the carpels also have become petaloid {Ranunculus, Columbine, Rose). In Rosa centifolia (fig. I 75), par- 6 ticularly, the successive steps by which a stamen becomes a petal are obvious; sometimes the anther enlarges, and one cell reddens (6); or both cells lengthen (5); or the connective reddens and dilates, and bears on one side a yellow scale, which recalls an anther-cell (4, 3); offcenest the stamen expands at once into a complete petal (2); sometimes (1) the proximity of the calyx seems to influence this petal; a green midrib traverses its coloured blade, and it becomes sepaline in the middle, petaline on the sides. In the double Columbine (fig. 176), the anther swells, and forms a hooded petal; and some- times, but more seldom, the filament dilates into a flat petal. The fourth whorl or pistil is the central;
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1873
