FEKNS OF WESTERN SUMATRA. 215 



J in. apart, enclosing copious minute areolae. Son large (about 

 1 lin. diarn.), orbicular, superficial, densely pilose, in erecto-patent 

 rows of 5 or 6 between the midrib and margin, filling up the whole 

 of the upper part of the frond and mixed with copious soft brown 

 stellate hairs.- Mt. Singalan, 1700 metres. Allied to P. albicans 

 and P. disiichocarpunu 



Poly podium nipestre, Blume. Mt. Singalan, 1700 metres. 

 P. longifolium, Mett. Ayer Mancior, 360 metres. 



445 (297*). Polypodium (Phymatodes, torulosum, Baker, n. sp. 

 Ehizome slender, epigieous, wide-trailing, densely clothed with 

 linear acuminate ciliated reddish-brown palese. Fronds very 

 dimorphous; sterile ones on stiffly-erect naked stipes 1-1| in. long ; 

 lamina simple, oblong or linear-oblong, entire, obtuse, 1-2^ in. 

 long, 6-9 lin. broad at the middle, cuneate at the base, rigidly 

 coriaceous, quite glabrous, the veins immersed and obscure, the 

 main ones erecto-patent, enclosing copious small irregular areola. 

 Fertile fronds on much larger stipes (4-5 in. long), the lamina 

 4-6 in. long, reduced to a mere midrib, from which the large 

 round- oblong sori bulge out at intervals on each side. Mt. Singalan, 

 1700 metres. Allied only to P. hammatosorvm, Harrington, from 

 the Philippine Islands. 



(304*). Polypodium (PhYxMATodes) subsparsum, Baker, n. sp. 

 Ehizome slender, wide-climbing, epigasous, firm, fiexuose, thinly 

 clothed with small adpressed bright brown lanceolate palese. Stipes 

 distant, stiffly erect, naked, 1-3 in. long. Lamina linear, entire, 

 rigidly coriaceous, quite naked on both sides, 3-6 hi. long, |-f in. 

 broad below the middle, narrowed gradually to both ends. Veins 

 immersed, obscure, the main ones erecto-patent, enclosing copious 

 small irregular areolae. Sori superficial, large, orbicular, crowded 

 in the narrowed upper half of the frond, not in regular rows. 

 Mt. Singalan, 1700 metres. Midway between P. lineare and 



P. rostratuin. 



461. P. normale, D. Don., var. sumatranwn, Baker. Sori 

 copious and scattered, as in var. P. lowjifrons, Wall., but the frond 

 firmer in texture, the lamina shorter and broader (8-10 in. long, 

 15-18 lin. broad), the base more suddenly cuneate, and the stipe 

 longer (4-5 in.) Mt. Singalan, 1700 metres. 



446 (333-). Poh/podivm {Pleuridium) costulatiun, Baker ; 

 AcrosHchum costulatum, Cesati, Fil. Becc. Polyn., 8.^ Ehizome 

 wide-creeping, slender, epigreous, densely clothed with erecto- 

 Patent linear brownish or bleached paleae. Fronds very dimorphous, 

 jlie sterile ones on slender distant naked stiffly-erect stipes 1-3 m. 

 loi *g. Lamina ovate-oblong, obtuse, entire, glabrous, rigidly 

 coriaceous, 1-2$ in. long, the base deltoid. Main veins erecto- 

 Patent, distinct and straight to the edge, £-£ in. apart, enclosing 

 copious small irregular areola*. Fertile fronds on much longer 



tli 



_. k-i 



e large crowded orbicular superficial son occupying its whole 

 under surface. Mt, Singftl&n, 1700 metres. A very distinct plant, 

 °J which Dr. Beccari previously gathered a single specimen in New 

 Guinea in his expedition of 1875. 



