35 research outputs found
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Hummingbirds as Pollinators of Flowers in the Red-Yellow Segment of the Color Spectrum, With Special Reference to Penstemon and the "Open Habitat"
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
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The Plant Collecting Brandegees, with Emphasis on Katharine Brandegee as a Liberated Woman Scientist of Early California
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
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The Southwestern Pipevine (Aristolochia watsonii) in Relation to Snakeroot Oil, Swallowtail Butterflies, and Ceratopogonid Flies
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
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A Classification of Life Forms of the Sonoran Desert, With Emphasis on the Seed Plants and Their Survival Strategies
Taxonomists have published large numbers of scientific articles, monographs and books attempting to classify the creatures which live on earth. Paradoxically, although form (morphology) has been the criterion most widely used by taxonomists to separate the various types of life (creatures) one from the other to produce classification schemes, relatively little attention has been devoted to classifying "life forms" per se. Perhaps this has resulted from a tendency to emphasize phylogenetic reconstruction in preference to the importance of form in relation to function in life. Indeed taxonomists have traditionally studied preserved (dead) specimens from which it can be notoriously difficult to make interpretations relating to functional adaptations. The classification of life forms is only superficially taxonomic. To classify them it is necessary to understand them. To understand them we need to know about their physiological ecology.Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
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Aloe vera, Plant Symbolism and the Threshing Floor
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
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Trichocereus as a Potential Nursery Crop in Southern Arizona, With Discussion of the Opuntia Borer (Cerambycidae: Moneilema gigas) as a Serious Threat to its Cultivation
Southern Arizona and southern California are economically competing regions with regard to production of ornamental cacti and succulents for sale throughout the United States. Economics of field -production vs greenhouse- production are discussed for both regions. Comparatively few cacti and succulents are field -produced in Arizona because few ornamental selections have been located which can economically be produced in the open considering the rigors of the desert environment. The Golden Torch Cactus (Trichocereus spachianus (Lem.) Ricc.) represents a promising nursery crop for field production in southern Arizona but has four seemingly unrelated problems. These problems are all shown to result from damage to Trichocereus by a single species of Cerambycid beetle, with damage to the cactus occurring throughout the life cycle of the beetle. Despite such an intimate relationship between beetle and Trichocereus, and although the beetle seems more destructive to Trichocereus than to native North American cacti, the beetle, far from proving to be an Argentinian introduction like Trichocereus, actually belongs to the genus of native Opuntia Borer (Moneilema), associated with Cholla and Prickly Pear in North America since the classic observations by Thomas Say on Major Long's 1819 -20 expedition to the Rocky Mountains. Although the present article is thought to be the first report of damage to Trichocereus by Moneilema, the degree to which we have found Trichocereus in Arizona to be infested suggests a rather long- standing condition. Specifically, we report Moneilema gigas LeConte to cause the following pathologic conditions in Trichocereus spachianus in Arizona: 1) bacterial and fungal rot of deep internal tissues, 2) external chewing disfiguration by adult beetles, 3) sporadic growth spurts making disfiguring constrictions of the stem, and 4) hollowing out of stems by boring larvae. Possible reasons for the virulence of Moneilema gigas in attacking Trichocereus are discussed. With the knowledge that four major problems associated with Trichocereus cultivation in Arizona actually result from infestation by a single beetle species, and with the possibility of controlling this insect pest, commercial field -production of the cactus in southern Arizona may finally prove economically rewarding.Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
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A Preliminary Theory for an Approach to Planning Environmentally Balanced Desert Landscaping
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
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Muhly Grasses and the Muhlenberg Family, with Notes on the Pietist Movement and the Pietistic Ecology
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]
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'J. G. Lemmon & Wife,' Plant Explorers in Arizona, California, and Nevada
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at [email protected]