94 Baker. A Summary of the new Ferns 



Summit peak of the Island of Ternate, Moseley (Challenger 

 expedition). 



333*. P, costulatum, Baker, in Journ. Bot. 1880, 215; Acrostichum 

 costulatum, Cesati, Fil. Becc. Polyn. 8. Mount Singalan, 

 Sumatra, alt. 5000-6000 ft., Beccari. 



334. P. triquetrum, Blume. Has now been found in Ternate, New 



Guinea, Samoa, and Fiji. 



334*. P. leucophorum, Baker, in Journ. Linn. Soc. XXII, 229. 

 Sarawak, Borneo, Bishop Hose, 129. 



335. P. rupestre, Blume. Has now been found in Sumatra and 



Perak. 



336. P. ovatum, Wall. Has now been found in several localities 



in China, and is evidently a mere form of the Japanese 

 P. ensatum, Thunb., our No. 344. 



336*. P. dimorphum, Baker, sp. n. Rhizome stout, woody, short- 

 creeping. Fronds dimorphic ; sterile many, with a slightly 

 paleacous stipe, 2-3 in. long, and a simple oblong-lanceolate 

 acuminate blade 3-4 in. long, 18-21 lines broad at the middle, 

 narrowed to the base ; fertile with a stipe 7-8 in. long, and a 

 lanceolate blade under an inch broad. Main veins of sterile 

 frond erecto-patent, flexuose, in. apart, not quite reaching 

 the edge. Sori irregularly 2-3-seriate between the main veins, 

 large, globose or two confluent in an oblong mass. Hainan, 

 Formosa, Rev. B. S. Henry. Near P. triquetrum. 



337. P. platyphyllum, Sw. Has been found in Perak by Scorte- 



chini. 



338*. P. Picoti, Rev. Hort. 1886, 20, fig. 62. Brazil; not deter- 

 minable. May be a form of crassifolium. 



339. P. membranaceum, Don. Has now been found in West 

 China and the Philippines. 



339*. P. Lastii, Baker, in Journ. Bot. 1891, 5. North- West Mada- 

 gascar, Last. Very near P. membranaceum. 



339*. P. Scortechinii, Baker, sp. n. Rhizome woody, wide-creeping, 

 flexuose, calvate. Stipe brown, naked, 15-16 in. long. Frond 

 oblanceolate, acuminate, membranous, glabrous, 16-18 in. long, 

 3-3 \ in. broad, obscurely repand, narrowed gradually from the 

 middle to the base. Main veins distinct to the edge |-in. 

 apart. Sori minute, superficial, scattered all over the surface 

 of the frond, often confluent. Perak, Scortechini. 



