BioStor
 | A Commentary on the Third Part of the Hortus Malabaricus Francis Hamilton (1826) Transactions of The Linnean Society of London 15: 78-152 |
 | Notes on new and noteworthy plants---I H N Moldenke (1947) Phytologia 2: 213-242 |
 | Materials toward a monograph of the genus Verbena. II H N Moldenke (1961) Phytologia 8: 108-152 |
 | Materials toward a monograph of the genus Verbena. VII H N Moldenke (1962) Phytologia 8: 395-453 |
 | Materials toward a monograph of the genus Verbena. XVIII H N Moldenke (1964) Phytologia 10: 89-161 |
 | Materials toward a monograph of the genus Verbena. XXIII H N Moldenke (1964) Phytologia 11: 1-68 |
 | Materials toward a monograph of the genus Verbena. XXVI H N Moldenke (1965) Phytologia 11: 219-287 |
 | Materials toward a monograph of the genus Verbena. XXVII H N Moldenke (1965) Phytologia 11: 290-357 |
 | Additional notes on the genus Verbena. IV H N Moldenke (1968) Phytologia 15: 478-495 |