Asia-Tropical, Eastern New Guinea present
Apparently throughout Malesia, to Eastern New Guinea, on mountains at 1200-2500 m, but specimens are few.
The specific epithet brunnea, taken up by Christensen in Index Filicum and sub- sequently used by several authors, was never val- idated. This Malesian species differs from the Indian P. pyrrhorhachis (Kunze) Ching in its massive erect caudex and larger size. I cannot decide, from herbarium specimens, how many species of this alliance occur in India; there, as in Malesia, more field work is needed.