The Entomologist - Royal Entomological Society of London (Simpkin, Marshall & Co, 1906)

Flora capensis :being a systematic description of the plants of the Cape colony, Caffraria, & Port Natal (and neighbouring territories) - Harvey, William H. (William Henry), 1811 -1866 (L. Reeve, 1904)

Flora capensis :being a systematic description of the plants of the Cape colony, Caffraria, & Port Natal (and neighbouring territories) - Harvey, William H. (William Henry), 1811 -1866 (L. Reeve, 1904)

Forsøg til en islandsk naturhistorie, med adskillige oekonomiske samt andre anmærkninger - Holm, S. M., (Trykt hos Christian Friderik Holm, 1786)

Index Kewensis. names of seed-bearing plants at the rank of family and below published between January 1991 and the end of 1995 with some omissions from earlier years Supplement twenty - Royal Botanic Gardens, Kew. (Royal Botanic Gardens, Kew)

Manual of the southeastern flora :being descriptions of the seed plants growing naturally in Florida, Alabama, Mississippi, eastern Louisiana, Tennessee, North Carolina, South Carolina and Georgia - Small, John Kunkel, 1869 -1938 (The author, 1933)

North American flora - New York Botanical Garden (New York Botanical Garden, 1922)

Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta - Candolle, Augustin Pyramus de, 1778 -1841 (Sumptibus Sociorum Treuttel et Würtz, 1846)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1898)