Volume 31, Issue 1 (2013)
Front Matter
Articles
Pectocarya anisocarpa, a new species of Boraginaceae, and a revised key for the genus in western North America
C. Matt Guilliams, Barbara A. Veno, Michael G. Simpson, and Ronald B. Kelley
Calystegia vanzuukiae (Convolvulaceae), a Remarkable New Species From Central California
R. K. Brummitt and Sandra M. Namoff
Helianthus winteri (Asteraceae), a New Perennial Species From the Southern Sierra Nevada Foothills, California
John C. Stebbins, Chris J. Winchell, and John V. H. Constable
Discovery of Claytonia lanceolata var. peirsonii in the San Bernardino Mountains Perpetuates a History of Taxonomic Uncertainty
Thomas R. Stoughton and Diana D. Jolles
A Newly Discovered Large and Significant Population of Castela emoryi (Emory’s Crucifixion Thorn, Simaroubaceae) in California
Duncan S. Bell and Tasya Herskovits
Factors Determining Mortality of Adult Chaparral Shrubs in an Extreme Drought Year in California
William A. S. Paddock III, Stephen D. Davis, R. Brandon Pratt, Anna L. Jacobsen, Michael F. Tobin, Jorge López-Portillo, and Frank W. Ewers