Alwyn H. Gentry|valerie Kapos (mo) - D. S. Johnson (botany) - D. S. Johnson (ny) - D. W. Marble (botany) - G. E. Nichols (botany) - Harris - J. A. Harris & J. V. Lawrence (botany) - T. G. Yuncker (botany) - W. H. (geneva Herbarium – De Candolle's Prodromus (g-dc)) - W. H. Harris (botany) - W. R. Maxon & E. P. Killip (botany) - W. R. Philipson (ny)