Pronephrium granulosum
Content
Distribution
Asia-Tropical: Philippines (Philippines present), Balabac present, Luzon present, Mindanao present, Palawan present, Panay present
Malesia: Philippines (Luzon, Palawan, Balabac, Panay, Mindanao).
Notes
One frond in Haenke's collection at Prague has two pinnae widened and irregularly deeply lobed distally; Presl named this var. lobata. This feature may indicate hybridity; it needs experimental investigation.
Young plants have much smaller pinnae than above described; the smallest fertile pinna seen measures 4.5 x 1.2 cm. A specimen from Balabac (J. B. Steere) has no glands on sporangia, and pinnae crenate to a depth of 2 mm; otherwise it is very near the type. A specimen from Mindanao has very narrow pinnae, the largest fertile one 5.0x0.8 cm.
Young plants have much smaller pinnae than above described; the smallest fertile pinna seen measures 4.5 x 1.2 cm. A specimen from Balabac (J. B. Steere) has no glands on sporangia, and pinnae crenate to a depth of 2 mm; otherwise it is very near the type. A specimen from Mindanao has very narrow pinnae, the largest fertile one 5.0x0.8 cm.