Volume 27(1)

Journal
of the
Arizona-Nevada Academy of Science


CONTENTS

New records and data for the rare Chrysothamnus molestus in Arizona.
    Loran C. Anderson and Bill Hevron
1
Additions to the flora of the Pinaleno Mountains, Arizona.
    Stephen P. McLaughlin
5
Seasonal precipitation regions and estimation of 30-year means for Arizona
    weather stations.
    Joyce A. Quinn
33
Effect of heat treatment on germination of seeds of
    Jorge Cancino, José Luis Léon de la Luz R. Coria H. Romero
49
Calcareous microfossils from the Upper Triassic of Petrified Forest
    National Park, Arizona.
    Spencer G. Lucas and Kenneth K. Kietzke
55
Gravity models of Southeastern Chino Valley, Central Arizona.
    David M. Best and Edward J. Cunion, Jr.
69
Seed and cone production by Engelmann Spruce in the Pinaleno Mountains, Arizona.
    Juliet C. Stromberg and Duncan T. Patten
79
Taxonomy and stratigraphyic distribution of Late Triassic Metoposaurid
    amphibians from Petrified Forest National Park, Arizona.
    Adrian P. Hunt and Spencer G. Lucas
89
Frémont cottonwood-gooding willow riparian forests: A review of their ecology,
    threats and recovery potential.
    J. C. Stromberg
97
Riparian mesquite forests: their ecology, threats, and recovery potential.
    J. C. Stromberg
111
Propagation of Arizona sycamore (Platanus wrightii Wats.)
    Catherine A. Plume, David A. Palzkill, and Bruce Roundy
125
Synopsis of the subspecies of the little striped whiptail lizard,
    Cnemidophorus inornatus Baird.
    John W. Wright Charles H. Lowe
129
Book Reviewes
    The Portable Radio in American Life
    Nature's Yellowstone
    Alaska: Reflections on Land and Spirit
    Fallout:L An American Nuclear Tragedy
    The History of a Southwestern Metropolis

158
159
160
161
162

1993
Published by the
Arizona-Nevada Academy of Science