FERNS OF WESTERN SUMATRA. 



211 



D. tenuifoUa, Sw. Mt. Singalan, 1200 metres. 



451. Lindsuya eultrata, Sw. Mt. Singalan, 1700 metres, and 



Ayer Maucior. 



L. lobata, Poir. Mt. Singalan, 1700 metres. 



583. Pteris loiujifolia, L. Ayer Maucior, 360 metres. 

 P. pellucida, Presl. With the last. 



591 (1*). Pteris reducta, Baker, n. sp. Stipes densely tufted, 

 naked, with only a few small linear scales at the base. Fronds 

 lanceolate, glabrous, green on both sides, rather firm in texture, 

 about a foot long, 2-2| in. broad, simply deeply pinnatifid or 

 pinnate, cut doAvn in the"upper part nearly, in the lower part quite 

 to the rachis into crowded ligulate obtuse segments £-^ in. broad, 

 30-40 pairs below the caudate apex. Veins close, distinct, deeply 

 forked. Sori extending from the base to the tip of the segments. 

 Involucre narrow, glabrous. Ayer Maneior, 360 metres. Closely 

 resembles P. quadriaurita in texture and veining, but the whole 



frond simply pinnate. 



Pteris quadriaurita, Retz. Ayer Maucior, and ascends Mt. 



Singalan to 1700 metres. 



P. biaurita, L. Ayer Maucior, 360 metres. 



416. P. excelsa, Gaudich. Mt. Singalan, 1700 metres. 



(1*). Pteris platysora, Baker, n. sp. Stipe 2-3 ft. long, naked, 

 stramineous upwards, castaneous towards the base. Lamma 

 li-2 ft. long, £ ft. broad, oblong-lanceolate, simply pinnate, 

 glabrous, green on both sides, moderately firm m texture, pinnae 

 about 25, simple, linear, erecto-patent, the lower distinctly petioied, 

 5-6 in. long, £-1 in. broad, entire, tbe upper sessile, the end one 

 like the others. Veins distant, simple or forked, bonis con- 

 tinuous, not reaching the tips of the pinna, one twelfth m. broaa. 

 Involucre broad and distinct, but hidden when the fruit is fully 



developed. Mt. Singalan, 1700 metres. Near P. longij oha, horn 

 which it differs by its distant pinnae , broad son, distant veins, <sc. 

 Whole plant reaching a height of 5-6 feet. Lower pinna *-* m. 



apart on the same side. _, . _• 011 v tm . 



417 (42* ). Pteris Radula, Baker, n. sp. Rhizome^ wiry ; subter- 

 ranean, wide-creeping, one-twelfth in. in diameter Stipes lemote 

 brown,' naked, 9-12°in. long, rough with minute raieed pmnte, 

 like the flexuose rachis. Lamina lanceolate, firm in textuie, 

 green and glabrous on both sides, 8-15 m long, 8-4 in. bioad 

 tripinnatifid or tripinnate. Lower pinnae deltoid, ^W«JJ* 

 lower side at the base, the unequal-sided del md 1«#* «£ *£■ 

 nearly or quite to the rachis into small oblong-cuneate tertiary 

 segments; upper pinna more lanceolate, with ^^"«£j 



segments. Veins free, immersed and *^JZ22ZTjk 

 reaching from the base nearly to the tip of the s ^ ent ^ ^ 

 v. 'lucre Wow, glabrous. Mt. Singalan, 1700 metie Close > 

 allied to P. sc<d>?ru!a of New Zealand but less "^P ^™ 1 

 fewer broader ultimate segments, resembling those of I . «£<< j. 

 424. P. incisa, Thunb., var. aurita, Blume. Mt. Singalan, 



1700 metres 



584. P. mar.jhuaa, Bory. Ayer Mancior, 360 metres. 



