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 |
 | Leon Croizat's Plant Collections from the Franco-Venezuelan Expedition to the Headwaters of the Rio Orinoco Bruce K Holst and Carol A Todzia (1990) Annals of the Missouri Botanical Garden 77: 485-516 |