. Foundations of botany. Botany; Botany. 318 FOUNDATIONS OF BOTANY from Part I of this book about the forms, structure, and habits of ordinary plants, together with what the student's own observation, aside from the study of botany, has taught him, should suffice to give him a fair idea of mesophytic plant life. The typical mesophyte of the northern United States is an annual, since most of our larger perennials pass the winter in a xerophytic condition, to avoid destruction by drying up during the long period when the roots can absorb little or no water. Fig. 225. â Cross-Section of Leaves of
. Foundations of botany. Botany; Botany. 318 FOUNDATIONS OF BOTANY from Part I of this book about the forms, structure, and habits of ordinary plants, together with what the student's own observation, aside from the study of botany, has taught him, should suffice to give him a fair idea of mesophytic plant life. The typical mesophyte of the northern United States is an annual, since most of our larger perennials pass the winter in a xerophytic condition, to avoid destruction by drying up during the long period when the roots can absorb little or no water. Fig. 225. â Cross-Section of Leaves of a Grass,^ unrolled for Exposure to Suulight and rolled up to prevent Evaporation. â /", ridges of tlie upper epidermis, â with many stomata on their surfaces; e, thick lower epidermis, without stomata. from the frozen soil. Our evergreen coniferous trees, such as pines, spruces, cedars, and so on, have leaves of decidedly xerophytic structure. So also do such ever- green shrubs as the rhododendrons, wintergreen, arbutus, holly, and bearberry. Our deciduous trees and shrubs and most perennial herbs are tropophytes (Sect. 390). 390. Tropophytes, or Seasonal Plants. â Examples of these are most deciduous trees and the majority of the perennials of temperate regions, for instance oaks, elms, birches among trees, and tulips, crown imperials, lilies, hyacinths, spring-beauties, peonies, dahlias, and potatoes among herbs. Such plants have a pretty large surface for 1 Stipa 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 Bergen, Joseph Y. (Joseph Young), 1851-1917; Eastwood, Alice, 1859-1953. Boston, Ginn & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
