BioStor
 | Report on the flora of western and southern Texas V Havard (1885) Proceedings of The United States National Museum 8: 449-533 |
 | The genera of Rhamnaceae in the southeastern United States G K Brizicky (1964) Journal of the Arnold Arboretum 45: 439-463 |
 | Notas sobre la flora de Colombia y paises vecinos A Dugand (1966) Phytologia 13: 379-400 |
 | Additional notes on the genus Bouchea. IV H N Moldenke (1974) Phytologia 29: 38-65 |
 | Studies in Neotropical Paleobotany. II. The Miocene Communities of Veracruz, Mexico Alan Graham (1976) Annals of the Missouri Botanical Garden 63: 787-842 |
 | Additional notes on the genus Lippia. VII H N Moldenke (1978) Phytologia 39: 78-106 |
 | The Metasequoia flora and its phytogeographic significance S Y Hu (1980) Journal of the Arnold Arboretum 61: 41-94 |
 | The Cerambycidae, or longhorned beetles, of southern Texas: a faunal survey (Coleoptera) Hovore F T, Penrose R L. and Neck R W. (1987) Proceedings of the California Academy of Sciences, San Francisco 44: 283-334 |
 | Una especie nueva de Karwinskia (Rhamnaceae) de Tehuacán, Puebla, México R Fernández N. and N Waksman (1992) Phytologia 73: 435-438 |