. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 423 organ is the most striking feature of the orchid and it assumes an almost endless variety of forms and colorations, being a good illustration of Wallace's law that the most highly modified part shows the greatest variation in coloration. In Cypripedium (Fig. 292, A) the labellum assumes the form of a moccasin, in other genera it resembles a vase, boat, tongue, body of insect, etc. It. Fig. 291. An epiphytic orchid growing upon the branch of a tree. The coarse roots, r, are surrounded by a mantle of cells which takes up the m
. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 423 organ is the most striking feature of the orchid and it assumes an almost endless variety of forms and colorations, being a good illustration of Wallace's law that the most highly modified part shows the greatest variation in coloration. In Cypripedium (Fig. 292, A) the labellum assumes the form of a moccasin, in other genera it resembles a vase, boat, tongue, body of insect, etc. It. Fig. 291. An epiphytic orchid growing upon the branch of a tree. The coarse roots, r, are surrounded by a mantle of cells which takes up the mois- ture from the atmosphere, b, storage organs formed from the base of the leaves, enabling the plant to produce flowers and fruit. The smaller stalks, u., are the shriveled remains of these organs after flowering and fruiting. is entire or variously lobed, slit, fringed and often prolonged into a tube for the concealment of nectar. The stamens and stigmas are reduced in number and greatly modified, the former organs usually being reduced to one and so fused with the style that the anther is sessile upon it (Fig. 292, B). One or two of the stig- mas are generally modified into a mucilage-secreting organ, called the rostellum (Fig. 293, A). The microspores are usually united. 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
