. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 449 Owing to their ability to retain moisture (page 45) they can exist in the crevices of rocks and upon dry soil, while the formation of roots from a bit of stem or even a leaf, as well as their habit of producing buds on short stems that afterward become detached and grow into new plants, brings about a sure distribution and explains their popular name, live-forever. (a) Some Variations of the Rose Order.—^The active growth of the base of the receptacle and the consequent crowding result in an interesting series of departures
. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 449 Owing to their ability to retain moisture (page 45) they can exist in the crevices of rocks and upon dry soil, while the formation of roots from a bit of stem or even a leaf, as well as their habit of producing buds on short stems that afterward become detached and grow into new plants, brings about a sure distribution and explains their popular name, live-forever. (a) Some Variations of the Rose Order.—^The active growth of the base of the receptacle and the consequent crowding result in an interesting series of departures from the simple type noted. Fig. 311. Higher forms of the Resales: A, flower of the saxifrage. B, flower in section, showing the partial adhesion of receptacle to ovary. C. inflorescence of currant (Ribes). D, section of flower, showing receptacle forming the cavity for the ovules which is roofed over by the carpels, epi- gynous flower. above that lead in very regular gradations to the highest forms of the order. In the higher family of the saxifrages, for example, which includes the saxifrage, false miterwort (Tiarella), heu' chera, bishop's cap {Mitella), golden saxifrage (Chrysosplenium), the receptacle generally adheres to the ovary (Fig. 311, A, B). so that the flower is, in a measure, epigynous and the carpels are reduced to two and partly fused. Passing to the families of the hydrangeas, syringas (Philadelphus), cuyants {Ribes), etc., the receptacle and carpels are quite fused (Fig. 311, C, D) and 29. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Curtis, Carlton Clarence, 1864-1945. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectbotany
