Affiliation: | 1. 2Harvard University Herbaria, 22 Divinity Avenue, Cambridge, Massachusetts 02138;2. Author for correspondence, current address: Arnold Arboretum of Harvard University, 125 Arborway, Jamaica Plain, MA 02130.;3. 3Department of Plant Biology, University of New Hampshire, Durham, New Hampshire 03824;4. and;5. 4Department of Biochemistry and Molecular Biology, University of New Hampshire, Durham, New Hampshire 03824 |