Contents
I.
Plant Conservation Strategies in the Southwest
National and International Conservation Efforts and their Relevance to
Plant Conservation in the Southwest
Nancy R. Morin ......................................................................................................................................
A Case for Conserving Imperiled Plants by Ecological Area
Tony Povilitis ..........................................................................................................................................
The Role of Landscape Anomalies in Regional Plant Conservation
S . Kelso, C. Hall, and G. Maentz ............................................................................................................
Introducing Two Federally Listed Carbonate-Endemic Plants onto a Disturbed
Site in the San Bernardino Mountains, California
Orlnndo Mistretta and Scott D. White ...................................................................................................
The White-Margined Penstemon, a Rare Mohave Desert Species, and the
Hualapai Mountains Land Exchange in Mohave County, Arizona
John L. Anderson .....................................................................................................................................
Determining Habitat Potential and Surveying for Nine Rare Plant Species in
South-Central Utah
Deborah J. Clark and Christine M . Groebner .........................................................................................
Results of a Conservation Agreement and Strategy for Rabbit Valley Gilia
L. A . Armstrong, T. 0.
Clark, and R. B. Campbell ................................................................................
11. Demography and Monitoring
Demographic Monitoring of Wright Fishhook Cactus
Ronald J. Kass .........................................................................................................................................
Demography and Monitoring of Welsh's Milkweed at Coral Pink Sand Dunes
Brent C. Palmer and L. Armstrong .........................................................................................................
The Demography of a Small Population of Yellow Columbines in the
Organ Mountains
Chris J. Stubben and Brook G. Milligan .................................................................................................
Monitoring Update on Four Listed Plants on the Arizona Strip
Lee E. Hughes ..........................................................................................................................................
Five-Year Monitoring Study of Siler's Pincushion Cactus in Kane County, Utah
Alyce M . Hreha and Therese B. Meyer ...................................................................................................
Tracking Rare Orchids (Orchidaceae) in Arizona
Ronald A. Coleman .................................................................................................................................
A Preliminary Population Study of Alcove Bog Orchid at Navajo
National Monument, Arizona
Laura E. Hudson .....................................................................................................................................
111. Autecology, Ecology, and Genetics
The Influence of Interplant Distance and Number of Flowers on Seed Set in
Dwarf Bear-Poppy
K. T. Harper, Renke Van Buren, and Zachary T. Aanderud ..................................................................
The Effects of Canopy Opening on the Population Size and Persistence of
Southwest Columbines
Kelly G. Gallagher and Brook G. Milligan ...........................................................................................
The Status of Burgess Broomshrub (or Gypsum Broomscale)
Juanita A. R. Lndyman and Patricia Gegick ..........................................................................................
Implications of Managing the Timing and Intensity of Herbivory for Conservation
of Arizona Leatherflower
Joyce Maschinski .....................................................................................................................................
Response of a Rare Endemic, Penstemon clutei, to Burning and Reduced
Belowground Competition
Peter Z . Fule', Judith D. Springer, David W . H u m a n , & W . Wallace Covington ...............................
Pollination Ecology of the Rare Orchid, Spiranthes diluvialis: Implications
for Conservation
Kim Pierson, Vincent J. Tepedino, Sedonia Sipes, and Kim Kuta .........................................................
Seed Ecology of a Rare Sage, Salvia dorrii subspecies mearnsii
Kristin D. Huisinga ................................................................................................................................
From the Greenhouse to the Field: Cultivation Requirements of Arizona Cliffrose
Joanne E. Baggs and Joyce Maschinski ...................................................................................................
Quantitative Genetics in Natural Populations: Means of Monitoring Natural
Biological Processes
Brook G. Milligan ...................................................................................................................................
Preliminary Report on the Reproductive Biology of the Threatened Chisos
Mountain Hedgehog Cactus
Bonnie B. Amos and Christos Vassiliou .................................................................................................
IV. Threats to Rare Plants
Dalmatian Toadflax, an Invasive Exotic Noxious Weed, Threatens Flagstaff
Pennyroyal Community Following Prescribed Fire
Barbara Goodrich Phillips and Debra Crisp ...........................................................................................
200
Extinction Risk of lpomopsis sancti-spiritus in Holy Ghost Canyon With and
Without Management Intervention
Joyce Maschinski .....................................................................................................................................
206
The Threat of Increasing Hybridization of an Endangered Plant Species,
Purshia subintegra, in the Verde Valley, Arizona
Joanne E. Baggs and Ioyce Maschinski ...................................................................................................
213
V. Factors Influencing the Distribution of Rare Plants
Distribution of Paradine Plains Cactus in Pinyon-Juniper Woodland on the North
Kaibab Ranger District, Kaibab National Forest
Arthur M . Phillips, 111, Debra J. Kennedy, Barbara G. Phillips, &Diedre Weage .................................
221
Cultural Influence As a Factor in Determining the Distribution of a Rare Sage,
Salvia dorrii subspecies mearnsii
Kristin D. Huisinga ................................................................................................................................
228
Distribution and Taxonomic Discussion of Tetraneuris z~erdiensis,an Apparently
Rare Edaphic Endemic from the Verde Valley of Arizona
Daniel J. Godec ........................................................................................................................................
238