Template:Ball, 1878c
- Ball, J. 1878. Spicilegium Florae Maroccanae. Parts IV. and V. Containing descriptions of Genera and Species, Boragineae to Gramineae; with an Enumeration of ther Ferns, Fern-allies, and Mosses. Journal of the Linnean Society. Botany 16(96–97): 569–742, pl. XXVII–XXVIII. DOI: 10.1111/j.1095-8339.1878.tb02312.x BHL