BioStor
 | ∑Miocene fossil woods from the Columbia basalts of Central Washington. J. Arnold Arb. 42: 165--203. U & E S Barghoorn Prakash (1961) Journal of the Arnold Arboretum 42: 165-203 |
 | William Hamilton (1783-1856) and the Prodromus Plantarum Indiae Occidentalis (1825) K S Clausen, Jr Gillis W. T. et al. (1981) Journal of the Arnold Arboretum 62: 211-242 |