auspiciis sumtibusque Regiae Societatis Horticulturae Londinensis in tutela ac praesidio Regii Horti Botanici Kewensis confectus curante O. Stapf = compiled from botanical and horticultural publications of the XVIIIth. and XIXth centuries ; prepared under the auspices of the Royal Horticultural Society of London at the Royal Botanic Gardens, Kew, by O. StapfE Prelo Clarendoniano1929-1931