BioStor
 | The vegetation of Beata and Alta Vela Islands, Hispaniola R A Howard (1955) Journal of the Arnold Arboretum 36: 209-239 |
 | ∑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 |