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.
Cita MLAButcher, Roger W. New Illustrated British Flora 2V. V1. Lycopodiaceae to Salieaceae. V2. Erieaeceae to Gramineae. 1961.
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