American fern journal - American Fern Society. (American Fern Society, 1972)

American fern journal - American Fern Society. (American Fern Society, 1972)

American fern journal - American Fern Society. (American Fern Society, 1972)

American fern journal - American Fern Society. (American Fern Society, 1972)

American fern journal - American Fern Society. (American Fern Society, 1972)

American fern journal - American Fern Society. (American Fern Society, 1976)

American fern journal - American Fern Society. (American Fern Society, 1976)

American fern journal - American Fern Society. (American Fern Society, 1976)

American fern journal - American Fern Society. (American Fern Society, 1976)

American fern journal - American Fern Society. (American Fern Society, 1998)

American fern journal - American Fern Society. (American Fern Society, 1998)

American fern journal - American Fern Society. (American Fern Society, 2003)

American fern journal - American Fern Society. (American Fern Society, 2003)

Annals of the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden Press, 1974)

Annals of the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden Press, 1974)

Annals of the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden Press, 1980)

Annals of the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden Press, 1980)

Catalogue of the vascular plants of Ecuador = Catálogo de las plantas vasculares del Ecuador - González, Amada Pedroni. (Missouri Botanical Garden Press, 1999)

Catalogue of the vascular plants of Ecuador = Catálogo de las plantas vasculares del Ecuador - González, Amada Pedroni. (Missouri Botanical Garden Press, 1999)

The Fern gazette - British Pteridological Society. (British Pteridological Society, 1974)

The Fern gazette - British Pteridological Society. (British Pteridological Society, 1974)

The Fern gazette - British Pteridological Society. (British Pteridological Society, 1974)

The Fern gazette - British Pteridological Society. (British Pteridological Society, 1979)

The Fern gazette - British Pteridological Society. (British Pteridological Society, 1979)

The Fern gazette - British Pteridological Society. (British Pteridological Society, 1979)

The Fern gazette - British Pteridological Society. (British Pteridological Society, 1979)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1993)

Fieldiana Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1993)

Missouri Botanical Garden bulletin - Missouri Botanical Garden. (Missouri Botanical Garden], 1990)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 2002)

Perú: Cordillera Escalera-Loreto - Stotz, Douglas F. (Douglas Forrester), 1956 - (The Field Museum, Science and Education, 2014)