? Aspidium glaberrimum
There is a photograph at BM of the type, but I did not find the specimen at Paris. I saw another specimen so named, collected by D'Urville in New Ireland in 1827. Both specimens differ from the type of Polystichum truncatum Gaud. in having entire pinna-lobes. They are very like small plants of Pneumatopteris sogerensis but the specimen from New Ireland has capitate hairs on the sporangia. A specimen from the Markham Valley, N.E. New Guinea (Wakefield 1505, BM) is about the same size as the type and has rather large club-shaped glands on the sporangia, but has also rather numerous short hairs on all parts of the lower surface of pinnae.