Download or read book The IUCN Plant Red Data Book written by Hugh Synge and published by IUCN. This book was released on 1978 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information on 250 selected plants on a world scale.

Download or read book Journal of the Washington Academy of Sciences written by Washington Academy of Sciences (Washington, D.C.) and published by . This book was released on 1950 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept. issue 1975- contains directory of members.

Download or read book Revision of Pearcea Gesneriaceae written by Lars Peter Kvist and published by . This book was released on 1996 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seventeen species of Pearcea (Gesneriaceae) are recognized, nine of which are new: Pearcea bella, P. bilabiata, P. cordata, P. fuscicalyx, P. glabrata, P. gracilis, P. grandifolia, P. intermedia, and P. strigosa. Of the remaining eight species, two were originally described in Pearcea, one is transferred herein from Kohleria, and five come from Parakohleria, a genus placed in synonymy herein. Pearcea occurs mainly on the eastern Andean slopes of Colombia (5 species), Ecuador (12 species), Peru (6 species), and Bolivia (1 species), and one species also occurs on the western Andean slopes in Ecuador. The largest number of species appears to occur in Ecuador, although additional species may occur in less explored parts of Peru. Pearcea differs from related and similar genera in the Gloxinieae by having fleshy capsules dehiscing by two valves and exposing a sticky seed mass. All species are herbs, usually with bright red flowers, and are usually found in the shady, humid forest understory, often near small streams. Hybridization, local speciation, and polymorphic variation may complicate the species delimitation. The variable Pearcea sprucei occurs throughout nearly the entire range of the genus (and includes the only accepted variety, var. parviflora), but most species are rare and local.

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1963 with total page 1450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genera of New World Eragrostideae Poaceae Chloridoideae written by Paul M. Peterson and published by . This book was released on 1997 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive study of generic concepts, evaluation of taxonomic characters, and a revised classification is presented for the Eragrostideae of the New World. An original set of data, consisting of 88 characters recorded for 38 genera, was collected and analyzed to produce a dichotomous key, a synoptic key, and comparative descriptions. A detailed discussion is presented on the characters and the distribution of the character states. Remarks on the morphology, taxonomic history, and relationships among the species within each genus and among the genera of Eragrostideae are given. A new combination is proposed for Neeragrostis contrerasii.

Download or read book Bibliography of Weed Investigations written by United States. Agricultural Research Service Field Crops and published by . This book was released on 1950 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Agricultural Index written by and published by . This book was released on 1952 with total page 2112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agricultural Index written by and published by . This book was released on 1952 with total page 2106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Synthetic Approach to the Plant Ecology of Desert Sand Dunes Eureka Valley California written by Bruce Michael Pavlik and published by . This book was released on 1979 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Taxonomic Index written by and published by . This book was released on 1947 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Smithsonian Contributions to Botany written by Smithsonian Institution and published by . This book was released on 1969 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Nucleus written by and published by . This book was released on 1960 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field Guide to Grasses of California written by James P. Smith Jr. and published by Univ of California Press. This book was released on 2014-09-12 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grasses and grasslands are of increasing interest to conservationists, biologists, and gardeners. There are more than 300 species of native California grasses and they are found in almost every climate—from cool, wet forests to hot, dry deserts. Native grasses are also important to land restoration as they improve soil quality, increase water infiltration, and recycle nutrients. Their deep roots can tap soil water, which allows them to stay green year-round and to act as fire buffers around residences. Native grasses also provide vital habitat for many species of insects, birds, reptiles, and mammals. Despite their importance, grasslands remain one of the most underprotected of California's vegetation types, and native grasslands have undergone the greatest percentage loss of any habitat type in the state. Grasses are also among the most difficult plants to identify. Organized alphabetically, Field Guide to Grasses of California covers common native and naturalized grasses and, to help identify them, also features over 180 color illustrations.

Download or read book Smithsonian Contributions to Botany written by and published by . This book was released on 1969 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to American Botanical Literature written by Torrey Botanical Club and published by . This book was released on 1969 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Abstracts written by and published by . This book was released on 1950 with total page 2114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flora of Micronesia written by Francis Raymond Fosberg and published by . This book was released on 1975 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: