. A manual of botany. Botany. GENERAL MORPHOLOGY OF THE PLANT 25 because they commonly grow upon other plants. They have frequently also small roots of the ordinary type, which penetrate into cracks or crannies in the bark of the supporting plant, from which they absorb small quantities of food from the debris which accumulates there. Many of the tropical Orchids [fig. 33) and Tillandsias afford us illustrations of epiphytic plants. The aerial roots of such plants are frequently green and serve as organs of assimilation. The aerial roots of Orchids have also a layer of usually very delicate fi
. A manual of botany. Botany. GENERAL MORPHOLOGY OF THE PLANT 25 because they commonly grow upon other plants. They have frequently also small roots of the ordinary type, which penetrate into cracks or crannies in the bark of the supporting plant, from which they absorb small quantities of food from the debris which accumulates there. Many of the tropical Orchids [fig. 33) and Tillandsias afford us illustrations of epiphytic plants. The aerial roots of such plants are frequently green and serve as organs of assimilation. The aerial roots of Orchids have also a layer of usually very delicate fibrous cells covering them, to which the name of velamen has been applied. Boots of Parasites.—These are plants which not only grow upon others, but which, instead of sending roots into the air and deriving their food from it, as is the case with the epiphytes. Fig. 34. Fig. 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 Green, J. Reynolds (Joseph Reynolds), 1848-1914. London, J. & A. Churchill
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