Pyrrosia nummularifolia
Description
Stellate hairs dimorphic, forming a thick mat, whitish with a distinct brownish upper layer composed of hairs with acicular rays.
Distribution
Asia-Tropical: Borneo present; Jawa (Jawa present); Lesser Sunda Is. present; Malaya (Peninsular Malaysia present); Philippines (Philippines present); Sulawesi (Sulawesi present); Sumatera (Sumatera present), Western Indochina to the Himalayas present
Western Indochina to the Himalayas; in Malesia: Sumatra, Peninsular Malaysia, Borneo, Java, Lesser Sunda Islands, Philippines, Sulawesi.
Morphology
2. Especially when sterile this species may be confused with P. piloselloides which has a similar habitus and habitat. Pyrrosia nummularifolia is always distinct in the dense, dimorphic indument.
1 Dimorphism. The sterile fronds are often appressed to the substrate, with the fertile fronds standing out. Intermediate, partly fertile fronds may occur, perhaps most frequently under adverse conditions.
3. The fronds are markedly succulent, with water-tissue often taking up more than half of the total thickness that may reach 1 mm.
Citation
Racib. 1898: Pterid. Buitenzorg: 101
Backer & Posth. 1939: Varenfl. Java: 239: f. 58
Copel. 1905: Polypod. Philipp.: 114
Hoshiz. 1981: p. 69. – In: Baileya: f. 9B.
Blume 1829: Fl. Javae Fil: 35: pl. 11, f. 3
Racib. 1898: Pterid. Buitenzorg: 101
Baker 1867: Syn. Fil.: 351
Willd. 1810 – In: Sp. Pl.: 100
Copel. 1960: Fern Fl. Philipp.: 475
Alderw. 1908: Malayan Ferns: 685
Hoshiz. 1981: p. 69. – In: Baileya: f. 9A
Mett. 1866 – In: Ann. Mus. Bot. Lugd.-Bat.: 230
Giesenh. 1901: Niphobolus: 179
Hovenkamp 1986 – In: Leiden Bot. Ser.: 214
Alderw. 1908: Malayan Ferns: 685
Dickason 1946 – In: Ohio J. Sc.: 129
Holttum 1955: p. 144. – In: Revis. Fl. Malaya: f. 59
Tagawa & Iwats. 1968 – In: Acta Phytotax. Geobot.: 52