Trimen, H., Thiselton-Dyer, W. T., & Hardwicke, R. (1869). Flora of Middlesex: A topographical and historical account of the plants found in the county : with sketches of its physical geography and climate, and of the progress of Middlesex botany during the last three centuries. Robert Hardwicke, 192 Piccadilly.

Trimen, Henry, et al. Flora of Middlesex: A Topographical and Historical Account of the Plants Found in the County : With Sketches of Its Physical Geography and Climate, and of the Progress of Middlesex Botany During the Last Three Centuries. Robert Hardwicke, 192 Piccadilly, 1869.