Schwartsburd, P.B., Yañez, A. & Prado, J. (2018)

Formal recognition of six subordinate taxa within the South American bracken fern, Pteridium esculentum (P. esculentum subsp. arachnoideum s.l.—Dennstaedtiaceae), based on morphology and geography

. Phytotaxa 333 (1): 22–40. https://doi.org/10.11646/phytotaxa.333.1.2