BioStor
 | A Fifth Summary of the Verbenaceae, Avicenniaceae, Stilbaceae, Dicrastylidaceae , Symphoremaceae, Nyctanthaceae, and Eriocaulaceae of the world as to valid taxa , geographic distribution, and synonomy. Supplement 7 H N Moldenke (1977) Phytologia 36: 28-48 |
 | Additional notes on the genus Lippia. IV H N Moldenke (1978) Phytologia 38: 385-406 |