| An Enumeration of the Plants of the Galapagos Archipelago; with Descriptions of those which are new Joseph Dalton Hooker (1847) Transactions of The Linnean Society of London 20: 163-233 | |
| On the Vegetation of the Galapagos Archipelago, as compared with that some other Tropical Islands and of the Continent of America Joseph Dalton Hooker (1847) Transactions of The Linnean Society of London 20: 235-262 | |
| ∑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 | |
| Tropical American plants, XV L O Williams (1973) Phytologia 26: 487-493 | |
| More additions to the Flora of Jamaica G R Proctor (1982) Journal of the Arnold Arboretum 63: 199-315 |