Botany - A new Dryopteris from Cuba.
Christensen, Carl.
Botany - A new Dryopteris from Cuba. - - Journal of the Washington Academy of Sciences : ; Vol 22, Nº 7, April 4. .
Botany - A new Dryopteris from Cuba. - - Journal of the Washington Academy of Sciences : ; Vol 22, Nº 7, April 4. .