Differs from P. brongniartii as follows: supra-basal pinnae to 30 cm long, near their bases bearing a few pairs of separately adnate pinnules, the largest 4.5 × 0.9 cm, lobed to almost halfway to the costa, lobes broadly rounded, basal acroscopic ones not enlarged, costules 3.5-4 mm apart connected by 1 row of costal areoles; rather sparse small scales and short hairs present on upper surface of rachis and costae, very slender hairs on the lower surface; unicellular ± elongate reddish glands present on lower surface, mostly on veins, some also on the upper surface; sori in a row near (but not touching) the margin of each pinnule-lobe, the distal ones on free veins; glands not seen in sori.
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