. Beginners' botany. Botany. THE ROOT— THE FORMS OF ROOTS 35 crevices and dark places of the wall or tree over which the plant ,j,^ climbs. The trumpet creeper (Fig. 36), true or ' English ivy, and poison ivy climb by means of roots. , „^.^ B, ^m^V/'. Fig. 37. — Aerial Roots of an Orchid. In some plants all the roots are aerial; that is, the plant grows above ground, and the roots gather food from the air. Such plants usually grow on trees. They are known as epiphytes or air-plants. The most fa- miliar examples are some of the tropi- cal orchids, which are grown in glass- houses (Fig. 37). Roo
. Beginners' botany. Botany. THE ROOT— THE FORMS OF ROOTS 35 crevices and dark places of the wall or tree over which the plant ,j,^ climbs. The trumpet creeper (Fig. 36), true or ' English ivy, and poison ivy climb by means of roots. , „^.^ B, ^m^V/'. Fig. 37. — Aerial Roots of an Orchid. In some plants all the roots are aerial; that is, the plant grows above ground, and the roots gather food from the air. Such plants usually grow on trees. They are known as epiphytes or air-plants. The most fa- miliar examples are some of the tropi- cal orchids, which are grown in glass- houses (Fig. 37). Roothke organs of dodder and other parasites are discussed in a future chapter. Fig. 36. — Aerial Roots OF Trumpet Creeper or 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 Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan company
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