1997 IUCN red list of threatened plants (1997)

Annals of the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden Press, 2004)

Annals of the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden Press, 2004)

Annals of the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden Press, 2004)

Catálogo de las plantas vasculares del Cono Sur : (Argentina, Sur de Brasil, Chile, Paraguay y Uruguay) - Missouri Botanical Garden. (Missouri Botanical Garden Press, 2008)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1965)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1965)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1965)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1965)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1970)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1970)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1970)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1987)

Index Kewensis plantarum phanerogamarum. nomina et synonyma omnium generum et specierum ab initio anni MDCCCCXLI usque ad finem anni MDCCCCL nonnulla etiam antea edita complectens Supplementum undecimum - Royal Botanic Gardens, Kew. (e prelo Clarendoniano, 1953)

Index Kewensis plantarum phanerogamarum. nomina et synonyma omnium generum et specierum ab initio anni MDCCCCXLI usque ad finem anni MDCCCCL nonnulla etiam antea edita complectens Supplementum undecimum - Royal Botanic Gardens, Kew. (e prelo Clarendoniano, 1953)

Modern systematic studies in African botany : proceedings of the eleventh plenary meeting of the Association for the Taxonomic Study of the Flora of Tropical Africa, Missouri Botanical Garden, St. Louis, June 10-14, 1985 ... - Lowry, Porter Prescott. (Missouri Botanical Garden, 1985)

Répertoire des noms génériques mentionnés dans l'Index kewensis et ses quinze premiers suppléments = Guide to the generic names appearing in the Index Kewensis and its fifteen supplements = Repertorio de los nombres genericos enumerados en el Index Kewensis y sus quince suplementos = Repertorium der im Index Kewensis und seinen fuenfzehn ersten Supplementen erwaehnten Gattungsnamen - Rouleau, Ernest 1916 -1991 (Châtelain, 1981)

Répertoire des noms génériques mentionnés dans l'Index kewensis et ses quinze premiers suppléments = Guide to the generic names appearing in the Index Kewensis and its fifteen supplements = Repertorio de los nombres genericos enumerados en el Index Kewensis y sus quince suplementos = Repertorium der im Index Kewensis und seinen fuenfzehn ersten Supplementen erwaehnten Gattungsnamen - Rouleau, Ernest 1916 -1991 (Châtelain, 1981)

Telopea: Journal of plant systematics - National Herbarium of New South Wales, (Royal Botanic Garden Sydney, 2003)