Pronephrium trachyphyllum

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Pronephrium trachyphyllum


Asia-Tropical: Philippines (Philippines present), Mindanao present
Malesia: Philippines (Mindanao), only known from type.


It is possible that larger sterile fronds might be produced on other plants. The fertile fronds differ from those of P. amphitrichum (in which the upper surface is hairy in a similar way) in having larger pinnae, sori not elongate and setose sporangia. The smaller fertile fronds of the type have shallowly crenate pinnae, but agree with the largest in having irregular long lobes on the apical lamina. Such irregular lobes are sometimes a sign of hybridity, but there are abundant good spores.