. L'histoire naturelle des plantes. La botanique. Fig. 23. Dissochoeta Stamins.-, le bourgeon de whicli est entouré par deux bractées concaves et valvaires formant un involucre : (fig. 24), et d'un diploste Daleni, Dissochoeta calyptriform- monous avec calice et deux proéminences antérieur du tissu conjonctif, souvent longilignes et setiform. Sakersia, de l'ouest de l'Afrique tropicale, est Dalenia avec fleurs pentamères (avoir '^ oicextamOsbeckias aussi nombre de caractères), et Dicellandra, escalade des arbustes du même pays, ont, en plus, un petit appendice basilaire au tissu conjonctif. Tous ces types avec nous représentent que sect

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. The natural history of plants. Botany. Fig. 23. Stamins.- Dissochoeta, the bud of whicli is surrounded by two concave and valvate bracts forming an involucre: (fig. 24), and Daleni'a, diploste- monous Dissochoeta with calyptriform calyx and two anterior prominences of the connective, often slender and setiform. Sakersia, from western tropical Africa, is Dalenia with pentamerous flowers (having '^ also many characters oicextamOsbeckias), and Dicellandra, climbing shrubs of the same country, have, besides, a small basilar appendage to the connective. All these types with us represent only sections of the genus Dissochceta. Marumia (fig., 25), which has many characters in common with the preceding genera (and also with Melastoma to which they lead us back), has a tubular recep- tacle, covered, as are likewise the four thick sepals, with a glandular or feathery down, and eight stamens the connective of which is prolonged at the base and is furnished at the point of union with the filament with two or more long slender filiform hairs. They inhabit the Indian Archipelago, Malaya, and the Philippine isles. A separate tribe has been made of Rhexia (whose name it has received) and of Monochcetum. In the latter (fig. 26), the tetramerous flowers have eight sta- mens in two verticils.; but the most de- veloped are superposed to the petals. At the back of the connective is a thick claviform appendage. In the alternipe- talous stamens, the anther of which is more slender, paler, and less rich in pollen, the dorsal appendage of the connective is longer and much less thick. Monochcetum comprises Peruvian and Mexican plants. In .Rhexia; belonging exclusively to North America, the stamens are but slightly unequal and have a dorsal Dissochceta ifihreocliiton) bibraeteala.. Fig. 24. Bud, enveloped in its , two lateral tracts.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these

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• bookcentury1800
• bookdecade1870
• booksubjectbotany
• bookyear1871