Desert Plants, Volume 1, Number 1 (August 1979) Item Type Article Publisher University of Arizona (Tucson, AZ) Journal Desert Plants Rights Copyright © Arizona Board of Regents. The University of Arizona. Download date 02/10/2021 01:18:53 Link to Item http://hdl.handle.net/10150/528188 Volume I. Number 1. August 1979 Desert Published by The University of Arizona for the Plants Boyce Thompson Southwestern Arboretum Assisting Nature with Plant Selection4 Larry K. Holzworth Aberrant Sex -Ratios in Jojoba Associated with Environmental Factors 8 Serena L. Cole 'J. G. Lemmon & Wife,' Plant Explorers in Arizona, California, and Nevada12 Frank S. Crosswhite 'Extinct' Wire -Lettuce, Stephanomeria schottii (Compositae), Rediscovered in Arizona after More Than One Hundred Years22 Elinor Lehto Southwestern Indian Sunflowers23 Gary Paul Nabhan Transition from a Bermudagrass Lawn to a Landscape of Rock or Gravel Mulch 27 Charles Sacamano Preliminary Evaluation of Cold- hardiness in Desert Landscaping Plants at Central Arizona College29 William A. Kinnison Effects of the 1978 Freeze on Native Plants of Sonora, Mexico33 Warren D. Jones The Severe Freeze of 1978 -79 in the Southwestern United States37 The National Climate Program Act of 197840 Reviews42 Arboretum Progress46 R. T. McKittrick Volume 1. Number 1. August 1979 Published by The University of Arizona Desert Plants for the Boyce Thompson Southwestern Arboretum The Severe Freeze of 1978 -79 in the Contents Southwestern United States37 Correspondents: Editorial Barrie D. Coate, Saratoga Horticultural Foundation; Dara E. Emery, Santa Barbara Botanic Garden; Louis C. Assisting Nature with Plant Selection 4 Erickson, Botanic Gardens, University of California, River- Larry K. Holzworth, USDA Soil Conservation side; Wayne L. Hansis, Botanical Garden, University of Service California, Los Angeles; Russell Haughey, Desert Botanical Garden of Arizona; Bob Perri11, Arizona -Sonora Desert Aberrant Sex -Ratios in Jojoba Associated Museum; John W. Provine, Los Angeles State and County with Environmental Factors8 Arboretum; Dick Tilforth, Rancho Santa Ana Botanic Serena L. Cole, Kalamazoo College Garden. "J. G. Lemmon & Wife," Plant Explorers The National Climate Program Act in Arizona, California and Nevada. 12 of 197840 Frank S. Crosswhite, University of Arizona and Boyce Thompson Southwestern Arboretum Reviews 42 Classified Bibliography on Native Plants of Arizona "Extinct" Wire- Lettuce, Stephanomeria Ervin M. Schmutz schottii (Compositae), Rediscovered in A Catalogue of the Flora of Arizona Arizona after More Than One Hundred J. Harry Lehr Years22 Leucaena, Promising Forage and Tree Crop for the Elinor Lehto, Arizona State University Tropics [Noel Vietmeyer and Beverly Cottam] Southwestern Indian Sunflowers23 Gary Paul Nabhan, University of Arizona Ecology of the Saguaro 11 and Arizona- Sonora Desert Museum Warren F. Steenbergh and Charles H. Lowe The Illustrated Encyclopedia of Succulents Transition from a Bermudagrass Lawn Gordon Rowley to a Landscape of Rock or Gravel Mulch 27 The Desert Charles Sacamano, University of Arizona John Cloudsley- Thompson Preliminary Evaluation of Cold - Ethnic Medicine in the Southwest hardiness in Desert Landscaping Plants Edward H. Spicer, editor at Central Arizona College29 Journal of Arid Environments William A. Kinnison, Central Arizona College John Cloudsley- Thompson, editor Effects of the 1978 Freeze on Native Arboretum Progress46 Plants of Sonora, Mexico 33 R.T. McKittrick, Boyce Thompson South- Warren D. Jones, University of Arizona western Arboretum Published by The University of Arizona Desert Plants for the Boyce Thompson Southwestern Arboretum A quarterly journal devoted to broadening knowledge of The Boyce Thompson Southwestern Arboretum at plants indigenous or adaptable to arid and sub -arid Superior, Arizona, is cooperatively managed by The regions, to studying the growth thereof and to encouraging Arizona State Parks Board, The Boyce Thompson South- an appreciation of these as valued components of the land- western Arboretum, Inc., and The University of Arizona. scape. Frank S. Crosswhite, editor Editorial Office Arboretum Staff: Boyce Thompson Southwestern Arboretum R.T. McKittrick P.O. Box AB Managing Director, and Head of Arboretum Operations Superior, Arizona 85273 Dr. R.P. Upchurch telephone /602) 689 -2811 Head, Department of Plant Sciences, University of Arizona and Head of Arboretum Research Arboretum Advisory Committee Dr. Carol D. Crosswhite William T. Smith, Chairman Curator and Educational Coordinator Boyce Thompson Southwestern Arboretum, Inc. Dr. Frank S. Crosswhite Charles R. Eatherly Curator and Research Scientist Arizona State Parks Leslie H. Ely Wesley P. Goss alternate) Park Ranger I Boyce Thompson Southwestern Arboretum, Inc. Mary M. Ely Warren D. Jones Secretary II University of Arizona Garnet Green Michael A. Ramnes Clerk I Arizona State Parks Marianna Holland Dr. R. P. Upchurch Research Assistant University of Arizona Thomas E. Ives Dr. Richard H. Wellman Maintenance Mechanic II Boyce Thompson Southwestern Arboretum, Inc. Kent C. Newland Dr. Newell A. Younggren /alternate) Ranger Assistant University of Arizona James Self Research Assistant Landscape Architects: Keith J. Teater Charles R. Eatherly Groundskeeper II Chief of Planning, Arizona State Parks Allen Gross Landscape Architect, Arizona State Parks Warren D. Jones Professor of Landscape Architecture, University of Arizona Editorial Editorial Editing and publishing Desert Plants has been develop through this journal, since information gen- chosen by the College of Agriculture of the Univer- erated at one desert station may be applicable at sity of Arizona as an appropriate activity for it to another. Articles are solicited regardless of geo- engage in under the tripartite program at the Boyce graphic region, the criterion for acceptance being Thompson Southwestern Arboretum. Itis an out- that they deal effectively and usefully with some growth of an idea first suggested by Dr. R. P. Up- aspect of desert plants. Articles may deal with any church, head of the Department of Plant Sciences, phase of arid land plant science -horticulture, land- and later developed during a series of work -sessions scape architecture, taxonomy, morphology, ecology, sponsored by the Environmental Horticulture Group physiology, weed- science, phytogeography and re- on the University campus at Tucson. vegetation. Also included will be contributions to Without support from the Boyce Thompson history of plant science in desert regions and bio- Southwestern Arboretum, Inc., and without cooper- graphies of desert plant scientists. ation from the Arizona State Parks Board, it would While the journal is one of the first tangible pro- have been difficult for the University to initiate this ducts to come from the University's new program at venture because of inadequate funding and man- the Arboretum, it is not the only new area of Arbo- power. As the management of the public aspects of retum commitment for the University, nor is it the the Arboretum passes from the University to the greatest. Other areas of active involvement are the Parks Board, the University has the opportunity to isolation of plant growth regulators from native channel its efforts more directly to academic, and re- plants, the development of a computerized infor- search activities at the Arboretum. mation- retrieval system for cultivated desert plants, Desert Plants is intended to be a semi -technical an international seed -exchange program, the devel- journal of interest to layman and professional alike. opment of a master research collection of desert It is hoped that it will faithfully chronicle the aca- plants, the screening and testing of desert landscap- demic and research activities at the Arboretum ing plants, studies of endangered species, as well as while serving as an effective medium of information taxonomy and distribution of the ornamental genus exchange among individuals and institutions with Pensternon. With this wide range of inter- related an interest in similar activities. Itis anticipated activities, the years ahead promise to be both chal- that a truly international exchange will eventually lenging and productive. 4 Desert Plants 1(1) August 1979 Man's activities leave various kinds of scars on our Assisting Nature earth and pollution in our environment. Given time and left alone, many of these scars heal themselves. with Plant Selection However, nature needs our help to accelerate the heal- ing and prevent further degradation of three vital re- sources: soil, water, and air. These resources must be Larry K.Holzworth conserved to insure adequate supplies of food and Tucson Plant Materials Center fiber for future generations. A fundamental tool for USDA Soil Conservation Service protecting these resources is plant material. The Plant Materials Program The USDA Soil Conservation Service (SCS) plant materials program was established in 1935 to assist private landowners with soil and water conserva- tion. SCS operates or provides funds and technical assistance to 22 plant materials centers (PMC) in the United States. Each PMC is located in a particu- lar phytographic area. The purposes of the SCS plant materials activities are to assemble, test, and release needed plant materials; determine techniques for their successful use; arrange for their commercial increase; and promote their use in resource conser- vation and environmental improvement programs. None of the plant materials work is possible with-