Volume 31, Issue 2 (2013)
This issue of Volume 31 was published 9th April, 2014.Front Matter
Articles
Forchhammeria and Stixis (Brassicales): Stem and Wood Anatomical Diversity, Ecological and Phylogenetic Significance
Sherwin Carlquist, Bruce F. Hansen, Hugh H. Iltis, Mark E. Olson, and Daniel L. Geiger
Arthopyrenia betulicola (Arthopyreniaceae, Dothidiomycetes), an Unusual New Lichenized Fungus From High Elevations of the Southern Appalachian Mountains
Richard C. Harris, Erin A. Tripp, and James C. Lendemer
A New Subspecies of Calystegia collina (Greene) Brummitt (Convolvulaceae) in the Coast Ranges of California and Notes on the Distribution of the Species
Richard K. Brummitt and Sandra M. Namoff
Time-Calibrated Phylogenies of Hummingbirds and Hummingbird-Pollinated Plants Reject a Hypothesis of Diffuse Co-Evolution
Erin A. Tripp and Lucinda A. McDade