• A Tale of Two Species: Speculation on the Introduction of Pachycereus pringlei in the Sierra Libre, Sonora, Mexico by Homo sapiens

      Yetman, David A.; Búrquez, Alberto; Center for Southwest Studies, The University of Arizona; Centro de Ecología, Northwest Regional Station, National Autonomous University of Mexico (University of Arizona (Tucson, AZ), 1996-06)
    • Teparies as a Source of Useful Traits for Improving Common Beans

      Thomas, Claire V.; Manshardt, Richard M.; Waines, J. Giles; Department of Botany and Plant Sciences, University of California (University of Arizona (Tucson, AZ), 1983)
    • Tepary Beans, O'Odham Farmers and Desert Fields

      Teiwes, Helga; Nabhan, Gary Paul; Arizona State Museum; Sative Seeds/SEARCH (University of Arizona (Tucson, AZ), 1983)
    • The Tepary Connection: A Visit with W. D. Hood

      Burgess, Martha Ames; Arizona-Sonora Desert Museum (University of Arizona (Tucson, AZ), 1983)
    • Tepary Cuisine

      Niethammer, Carolyn (University of Arizona (Tucson, AZ), 1983)
    • The Tequila Industry in Jalisco, Mexico

      Valenzuela-Zapata, Ana Guadalupe; Facultad de Agricultura, Universidad de Guadalajara (University of Arizona (Tucson, AZ), 1985)
      In Jalisco, several liquors are extracted from plants of the genus Agave L. Tequila is the most important of these, because of its large national and international market. It is a major Mexican export product. In order to produce the various tequilas, the juices of Agave tequilana Weber are fermented, distilled, and prepared in various forms. The principal plantations are located between 20°30' and 21° north latitude and 102°30' and 104° west longitude and cover 16,000 hectares of dry-farmed lands with a warm temperate, semi-arid climatic regime. Over 50% of the factories are located in the Tequila region of Jalisco; these account for 80% of the world production.
    • Texas Hechtias - Terrestrial Bromeliads along the Rio Grande

      Johnson, Matthew B.; Desert Legume Program (University of Arizona (Tucson, AZ), 1999-06)
    • The Theory Behind the Clump-Flatting Procedure in Cactus Propagation

      Crosswhite, F. S.; Crosswhite, C. D. (University of Arizona (Tucson, AZ), 1988)
    • Threats to Sky Island Communities of Southeastern Arizona

      Baynham, Patti; Boyce Thompson Arboretum (University of Arizona (Tucson, AZ), 2012-06)
    • Tissue Culture and Cloning of Carnegiea gigantea, Cactaceae

      Baker, William P.; Hanks, Tyrone Harvard; Marin, Louis Eduardo; Biomedical Sciences, Midwestern University; Life Sciences Department, Mesa Community College (University of Arizona (Tucson, AZ), 2015-05-20)
      Cloning has become an established method of supplying valuable timber trees and other plants for commercial purposes. Cloning of these plants allows multiple copies to be produced from superior phenotypes. In this study, in vitro clones were produced from phenotypically selected, commercially available saguaro (Carnegiea gigantea). The clones were produced from tissue plugs obtained from surface sterilized saguaro. The plugs were transferred using standard aseptic technique to culture dishes containing solid Callus Initiation Medium (Gamborg's B-5 medium supplemented with 10 mg/l auxin and 8 g/l agar). The cultures were incubated under continuous cool fluorescent lights at 24 C until callus formation was observed. Healthy callus were transferred to solid Development Medium (Gamborg's B-5 medium supplemented with 10 mg/l auxin, 10.0 mg Kinetin, and 8 g/l agar) and further incubated. Resulting clones were prepared for in vivo conditions by transfer to sterile potting soil and successfully outplanted to the green house. Such clones may supply scarce C. gigantea for future research. The use of single genotypes for ecological applications should be avoided since they lack natural population variability.
    • Trails of the Boyce Thompson Southwestern Arboretum

      University of Arizona (Tucson, AZ), 1992
    • Transition from a Bermudagrass Lawn to a Landscape of Rock or Gravel Mulch

      Sacamano, Charles; Department of Plant Sciences, University of Arizona (University of Arizona (Tucson, AZ), 1979-08)
    • Trends in Distribution and Size of Stomata in Desert Plants

      Sundberg, Marshall D.; University of Wisconsin - Eau Claire (University of Arizona (Tucson, AZ), 1985)
    • 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

      Crosswhite, Carol D.; Crosswhite, Frank S.; Boyce Thompson Southwestern Arboretum; University of Arizona (University of Arizona (Tucson, AZ), 1985)
      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.
    • Two Rare Plants of the Arizona Strip

      Hughes, Lee E.; U.S. Department of the Interior, The Bureau of Land Management (University of Arizona (Tucson, AZ), 1997-06)
    • Two Recent Agave Introductions

      Starr, Greg (University of Arizona (Tucson, AZ), 1998-12)
    • An Ultraviolet Trap Survey of Insects at the Upper Reaches of Sonoran Desertscrub Vegetation in Central Arizona

      Randall, Cay; May, Judson E.; Arizona Commission of Agriculture and Horticulture (University of Arizona (Tucson, AZ), 1988)
    • Vegetation and Flora of the Gran Desierto, Sonora, Mexico

      Felger, Richard S.; Arizona-Sonora Desert Museum; Environmental Research Laboratory, University of Arizona (University of Arizona (Tucson, AZ), 1980)
      The Gran Desierto of northwestern Sonora is one of the most arid regions of North America. The flora and vegetation of the Sierra del Rosario and the surrounding extensive dune system are analyzed and compared with each other. The dunes, covering on the order of 4,500 sq. km., support a flora of 75 species, while the Sierra, comprising approximately 78 sq. km., supports 105 species. The total flora consists of 145 species, with 36 species common to both the dunes and Sierra. The life -form spectra are indicative of extremely arid conditions: ephemeral species make up 55% of the total flora. A number of range extensions are reported. Mentzelia longiloba is reduced to a subspecies of M. multiflora. There are only three non-native, naturalized species among the dune flora, and none in the Sierra flora. There is no indication of endemism among the Sierra flora. In contrast, the dunes, when considered together with similar habitat in adjacent southeastern California and southwestern Arizona, show some level of evolutionary differentiation for approximately 15% of the flora.
    • Vegetation of Grassy Remnants in the Las Vegas Valley, Southern Nevada

      Craig, Jill E.; Abella, Scott R.; Public Lands Institute, University of Nevada Las Vegas (University of Arizona (Tucson, AZ), 2008-06)
      The approximately 1000-km² Las Vegas Valley contains a rich assemblage of unique plant communities in the eastern Mojave Desert. Yet, there is little published documentation of this vegetation as its destruction continues with proceeding urban development. Development has intensified after the 1998 Southern Nevada Public Land Management Act mandated the disposal of federal lands. We document plant communities at four unique grassy remnants, some of which have since been destroyed, in the southwestern Las Vegas Valley. Sample plots of 0.25 or 0.09 ha at each site contained washes (supporting catclaw [Acacia greggii] at three sites) and associated uplands. Native perennial grasses comprised 12% of plant species richness/100 m2 and 5% of total relative cover on average. A total of 8 native perennial grasses were detected at the four sites, with predominant species including fluff grass (Dasyochloa pulchella), purple three-awn (Aristida purpurea), big galleta (Pleuraphis rigida), red grama (Bouteloua trifida), and slim tridens (Tridens muticus). These communities appeared as grass-shrublands, rather than the widespread shrublands commonly described for the Mojave Desert. Of large shrubs at the three sites containing catclaw, catclaw density ranged from 52-124/ha, Mojave yucca (Yucca schidigera) from 8-32/ha, and creosote bush (Larrea tridentata) from 168-456/ha. We also obtained permission to salvage native plants from one site prior to land development. Overall survival of salvaged plants of eight species exceeded 76% after one year of greenhouse/outdoor storage. We suggest that while many opportunities have already been lost, collecting and documenting information on the rich vegetation of the Las Vegas Valley and salvaging native plants or seed for use in desert landscaping, parks and habitat improvement in protected areas would leave a future legacy of this ecologically unique region.
    • Vegetation of the Gila River Resource Area, Eastern Arizona

      Minckley, W. L.; Clark, Thomas O.; Department of Zoology, Arizona State University; Center for Environmental Studies, Arizona State University (University of Arizona (Tucson, AZ), 1982-01)