Excerpt from A Yosemite Flora: A Descriptive Account of the Ferns and Flowering Plants, Including the Trees, of the Yosemite National Park; With Simple Keys for Their Identification; Designed to Be Useful Throughout the Sierra Nevada Mountains The Yosemite National Park is perhaps the most delightful region in all the world for the study of plant life. The wide variety of conditions here found, ranging from the hot and desiccated slopes of the brush-clad foothills to the cold, bleak summits above timber-line, the abode of glaciers and perpetual snow, gives to the flora an exceedingly diverse and interesting character. Innumerable springs, creeks, rivers, ponds, and lakes provide suitable habitats for moisture-loving plants. Rocky outcroppings, enormous cliffs, and gravelly ridges accommodate species adapted to such situations. The irregular topography yields southward facing slopes which receive the full effect of the sun's rays, as well as northward slopes where the sun's rays are little felt, where it is therefore cool, moist, and shady. The altitude ranges from two thousand five hundred feet in the foothill belt to thirteen thousand and ninety feet along the crest of the Sierra Nevada. All of these factors conspire to produce a remarkably varied and interesting vegetation. The richness of this flora is indicated by the nine hundred and fifty-five species and varieties here described. The total number represented in the Yosemite National Park is considerably greater, since the grasses, sedges, and rushes are here omitted. Including an estimate for these, it is safe to assume that the number of species and varieties of flowering plants and ferns to be found within the one thousand one hundred and twenty-four square miles of the park is not less than about one thousand two hundred. In preparing a pioneer flora for a district like the Yosemite, many corners of which have not yet been botanically explored, it is manifestly impossible to avoid the omission of some species. The authors have made use of every available source of information and have themselves botanized over much of the Park. It is therefore improbable that the list will be greatly extended except for the addition of foothill species, which will doubtless be found creeping up along our lower borders, especially in the vicinity of Wawona and Hetch Hetchy valleys, and for the addition of boreal species, the ranges of which will be extended southward at high altitudes. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.