• Boyce Thompson Arboretum and Desert Legume Program's Search for the Wild Astragalus

      Siegwarth, Mark; Boyce Thompson Arboretum (University of Arizona (Tucson, AZ), 2011-12)
    • Boyce Thompson Arboretum Freeze Damage Analysis

      McNeill, Brad; Balling, Robert C.; School of Geographical Sciences and Urban Planning, Arizona State University (University of Arizona (Tucson, AZ), 2011-12)
    • Desert Plants, Volume 27, Number 2 (December 2011)

      Unknown author (University of Arizona (Tucson, AZ), 2011-12)
    • Famine Foods of Rajasthan Desert

      Bhansali, R. Raj; Central Arid Zone Research Institute (University of Arizona (Tucson, AZ), 2011-12)
    • Phenotypic Variations in Communities of Calligonum comosum L'Her (Polygonaceae) from Saudi Arabia

      Taia, Wafaa K.; Moussa, Sanaa A. I.; Alexandria University, Botany Department; Cairo University, Botany Department (University of Arizona (Tucson, AZ), 2011-12)
      Vegetative community structures and phenotypic variations within Calligonum comosum L'Her communities growing in two different locations in Saudi Arabia, Nefud Al-Shakika and Al-Dahnaa, have been studied. Eleven species have been recorded in both areas; five of them were present in both locations. Ephedra elata and Convolvulus lanatus were recorded in Nefud Al-Shakika only, while Heliotropium bacciferum, Cleome arabica, Dodonaea vis cos a and Erodium gleurocophyllum were found in Al-Dahnaa only. The Importance Values of the species recorded have been calculated and cluster analyses of the studied quadrats have been conducted using TWINSPAN. Vegetative morphological characteristics showed great variation within Calligonum comosum collected from the two locations. Floral morphological characteristics were more stable, except for fruit color and hair which were different in the Calligonum comosum plants grown in the two locations. Epidermal stem secretions as well as mineral content varied in response to change in location. AN OVA tests have been carried out to evaluate the differences between the two areas. The variations in these characteristics are discussed according to the differences in climate, soil and water availability.
    • Summary of the February Freeze and Effects on Plants in DELEP's Tucson Fields

      Johnson, Matthew B.; Desert Legume Program, The University of Arizona (University of Arizona (Tucson, AZ), 2011-12)