. A textbook of botany for colleges and universities ... Botany. 498 ECOLOGY horizontal nutritive roots. The root systems of trees differ widely, the ash, for example, having roots of great length, while the more numerous roots of the beech are much shorter and finer. Roots as an horage organs. — In a mature plant with a complex root system, a division of labor is manifest. A sorption is limited to the younger portions of the roots, where there is a delicate epidermis per-. FiGS. 708, 709. — Roots of the peppergrass (Lepidium): 708, an or- dinary primary root with laterals; 709, a root origina
. A textbook of botany for colleges and universities ... Botany. 498 ECOLOGY horizontal nutritive roots. The root systems of trees differ widely, the ash, for example, having roots of great length, while the more numerous roots of the beech are much shorter and finer. Roots as an horage organs. — In a mature plant with a complex root system, a division of labor is manifest. A sorption is limited to the younger portions of the roots, where there is a delicate epidermis per-. FiGS. 708, 709. — Roots of the peppergrass (Lepidium): 708, an or- dinary primary root with laterals; 709, a root originally similar to 708, but from which vigorous lateral roots have developed, following the re- moval of the primary root. meab'e to water and salts. Anchorage, on the other hand, is preeminently the rdle of the much-branched root system. On the whole there is a sort of correlation between the developing stems and roots, large aerial stem systems commonly being associated with extensive root systems. Only in certain situations, such as swamps (see p. 509), or when there are imusual winds, as during tornadoes and hurricanes, are tree " wind-. 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 Coulter, John Merle, 1851-1928; Barnes, Charles Reid, 1858-1910, joint author; Cowles, Henry Chandler, 1869- joint author. New York, Cincinnati [etc] American book company
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