Harold St. John 



Hawaiian flora 



Egeria 



Elodea 



Benjamin C. Stone 



Rutaceae 



Pandanaceae 



Donald E. Stone 



Juglandaceae 



Gerald B. Straley 



Oenothera 



Richard M. Straw 



Keckiella 



Penstemon 



Chionophila 



Nothochelone 



John L. Strother 



Bartlettia 



Cacaliopsis 



Chrysactinia 



Dyssodia 



Gynura 



Haploesthes 



Lepidospartum 



Luina 



Nicolletia 



Peucephyllum 



Porophyllum 



Psathyrotes 



Tagetes 



Tetradymia 



Ronald L. Stuckey 



Nasturtium 



Rorippa 



Butomus 



Nymphoides 



Armoracia 



Cardamine 



Epilobium 



Carduus 



Lycopus 



Howard C. Stutz 



Atriplex 



Grayia 



Zuckia 



Peter Taylor 



Lentibulariaceae 



Edward E. Terrell 



Hedyotis 



Houstonia 



Oldenlandia 



Pentodon 



Joab Thomas 



Cyrillaceae 



Henry J. Thompson 



Loasaceae 



Kaye Thome 



Atriplex 



Howard F. Towner 



Calylophus 



Oenothera 



John M. Tucker 



Quercus 



Ronald J. Tyrl 



Achillea 



S.P. Vander Kloet 



Vaccinium 



Susan Verhoek 



Manfreda 



Robert K. Vickery 



Mimulus 



Jose L. Vivaldi 



Malpighia 



G. Ainsley Wallace 



Smilax 



Daniel B. Ward 



Florida taxa 



Donna M.E. Ware 



Valerianella 



Dieter C. Wasshausen 



Acanthaceae 



Jocelyn M. Webber 



Carex 



William A. Weber 



Colorado distributions 



Grady L. Webster 



Phyllanthus 



Margaritaria 



Stanley L. Welsh 



Leguminosae (Utah) 



Thomas Wendt 



Polygalaceae 



Hugh D. Wilson 



Chenopodium 



Donald R. Windier 



Crotalaria 



Neptunia 



Dennis W. Woodland 



Urticaceae 



Jean W. Wooten 



Sagittaria 



Richard P. Wunderlin 



Bauhinia 



John J. Wurdack 



Melastomataceae 



Polygalaceae (Caribbean) 



Clematis 



IV 



