Pteridografía del sur de México ó sea clasificación y descripción de los helechos de esta región. precedida de un bosquejo de la flora general,

cover bears date 1910

Species filicum being descriptions of the known ferms, particularly of such as exist in the author's herbarium....[etc.].

Mode of access: Internet.

Species filicum being descriptions of the known ferms, particularly of such as exist in the author's herbarium....[etc.].

Mode of access: Internet.

Species filicum being descriptions of the known ferms, particularly of such as exist in the author's herbarium....[etc.].

Mode of access: Internet.