Biennial report - Los Angeles County (Calif.). Department of Arboreta; Botanic Gardens. (Dept. of Arboreta & Botanic Gardens, 1963)

The Bradley bibliography; a guide to the literature of the woody plants of the world published before the beginning of the twentieth century - Sargent, Charles Sprague, 1841 -1927 (Riverside Press, 1911)

Bulletin du Jardin botanique de Buitenzorg - 's Lands Plantentuin. (1898)

Catalogue of plants 2010 : Adelaide, Mount Lofty and Wittunga Botanic Gardens - Botanic Gardens Of Adelaide; State Herbarium (Botanic Gardens of Adelaide, 2010)

Index Kewensis plantarum phanerogamarum. nomina et synonyma omnium generum et specierum ab initio anni MDCCCCXXXVI usque ad finem anni MDCCCCXL nonnulla etiam antea edita complectens Supplementum decimum - Royal Botanic Gardens, Kew. (e prelo Clarendoniano, 1947)

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)

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1899)

ri ben zhi wu ming hui - Honda, Masaji 本田正次 1897 -1984 (san sheng tang)

shan cha shu zhi wu de xi tong yan jiu 山茶属植物的系统研究 - Zhang, Hongda 张宏达 (zhong shan da xue xue bao bian ji bu 中山大学学报编 辑部, 1981)

United States National Arboretum contribution - National Arboretum (U.S.) (The Service, 1994)

Wildland shrubs– their biology and utilization - Intermountain Forest; Range Experiment Station (Ogden, Utah) (Intermountain Forest and Range Experiment Station, U.S. Dept. of Agriculture, 1972)