BioStor
 | A botanical survey of the Galapagos Islands Alban Stewart (1911) Proceedings of the California Academy of Sciences 1: 7-288 |
 | Studies in the flora of Lower California and adjacent islands Alice Eastwood (1929) Proceedings of the California Academy of Sciences 18: 393-484 |
 | Additional notes on the genus Priva. II H N Moldenke (1954) Phytologia 5: 61-80 |
 | Materials toward a monograph of the genus Verbena. XXIV H N Moldenke (1964) Phytologia 11: 80-142 |
 | Additional notes on the genus Priva. IV H N Moldenke (1967) Phytologia 14: 336-357 |