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Abies Abies concolor abundant Acer alba Alnus alpine altitude Arenaria associated Bahamas Basin belt Betula bogs Botanical Gazette Botany Bulletin California canadensis canyons Carex Carya Cercocarpus coast coastal Colorado coniferous consists Cornus covered Crataegus Cretaceous desert distribution Douglasii dunes eastern elevation Engelm extends feet ferns flora Florida Forest Formation forms Fraxinus genera Geological glacial glauca grasses Gray grow growth Harshberger herbaceous Hicoria hills islands Juncus Juniperus Juniperus virginiana Lake land Marsh Mexico Michx miles nigra North America northern Nutt occidentalis occur Pacific palustris Picea pine barren Pinus Pinus ponderosa plain Platanus plateau ponderosa Populus prairie Prunus Pursh Quercus Quercus alba range region Rhus ridges River rocks Rocky Mountains rubra Salix sand Scirpus shore shrubs Sierra Nevada slopes soil Solidago southern species streams summits Survey swamps temperature Texas Torrey trees tropic Tsuga Tsuga canadensis Vaccinium valleys vegetation virginiana western xerophytic Yucca
Page 57 - Catalogue of Plants growing spontaneously within Thirty Miles of the City of New York, Albany, 1819, 8vo.
Page 309 - Pennsylvania (lat. 45°-47°), with those of Oregon, and then with those of North-Eastern Asia, we shall find many of our own curiously repeated in the latter, while only a small number of them can be traced along the route even so far as- the western slope of the Rocky Mountains. And these repetitions of East -American types in Japan and neighboring districts are in all degrees of likeness. Sometimes the one is...
Page 54 - Arbustrum Americanum: The American grove, or, An alphabetical catalogue of forest trees and shrubs, natives of the American United States, arranged according to the LInnaean system.
Page 42 - The Silva of North America. A description of the Trees which grow naturally in North America, exclusive of Mexico.
Page 73 - Descriptions of new species and genera of plants in the natural order of the Compositae, collected in a tour across the continent to the Pacific, a residence in Oregon, and a visit to the Sandwich Islands and upper California, during the years 1834 and 1835.
Page 334 - Investigations conducted by the Biological Survey have shown that the northward distribution of terrestrial animals and plants is governed by the sum of the positive temperatures for the entire season of growth and reproduction, and that the southward distribution is governed by the mean temperature of a brief period during the hottest part of the year.
Page 86 - ... properly appreciated by geologist and geographer, owing, no doubt, to the fact that its remarkable and continuous ranges are largely submerged beneath the waters of the Caribbean Sea. East-and-west mountain ranges of the Antillean type occur through the Great Antilles, along the Venezuelan and Colombian coast of South America, north of the Orinoco; in the Isthmus of Panama, Costa Rica, and the eastern parts of Nicaragua, Guatemala, Honduras, Yucatan, Chiapas, and southern Oaxaca. The two elongated...
Page 309 - Sometimes the one is undistinguishable from the other ; sometimes there is a difference of aspect, but hardly of tangible character ; sometimes the two would be termed marked varieties if they grew naturally in the same forest or in the same region ; sometimes they are what the botanist...
Page 106 - Mexico, is low, flat, and sandy, except near the mouth of the Tabasco River, where at some distance from the coast appear the heights of San Gabriel, extending northeast and southwest for sev•eral miles ; but the majestic mountains of Veracruz...
Page 107 - Lyall's theory that Mexico consisted originally of granite ranges with intervening valleys subsequently filled up to the level of the plateaus by subterranean eruptions. Igneous rocks of every geologic epoch certainly form to a large extent the superstructure of the central plateau. But the Mexican table-land seems to consist mainly of metamorphic formations...