BioStor
 | Additions to the flora of Washington and vicinity, from April 1, 1884 to April 1, 1886 F H Knowlton (1886) Proceedings of The Biological Society of Washington 3: 106-132 |
 | Observations on the vegetation of Lord Howe Island J H Maiden (1898) Proceedings of the Linnean Society of New South Wales 23: 112-158 |