Butcher, R. W. (1961). New illustrated British flora 2V. V1. Lycopodiaceae to salieaceae. V2. Erieaeceae to gramineae.
Chicago Edition CitationButcher, Roger W. New Illustrated British Flora 2V. V1. Lycopodiaceae to Salieaceae. V2. Erieaeceae to Gramineae. 1961.
MLA Edition CitationButcher, Roger W. New Illustrated British Flora 2V. V1. Lycopodiaceae to Salieaceae. V2. Erieaeceae to Gramineae. 1961.
Warning: These citations may not always be 100% accurate.