210 FERNS OF WESTERN SUMATRA. 



Singalan. Allied to C. araclmoidea, Hook., in cutting and texture, 



but very different in son and involucre. It is only unusuallj 

 developed tertiary segments in which the veinlets are more or less 

 pinnate that show any crenation or lobing, as occurs not unfre- 

 quently in other tripinnate tree ferns in which the tertiary segments 

 are typically entire. 



431 (39 : ' : ). Alsophila .aiodesta, Baker, n. sp. Stipe under a 

 foot- long, its glossy dark brown linear scales reaching \ in. long. 

 Fronds 2^-3 ft. long, rhomboid, tripinnate, moderately firm in 

 texture, green and nearly glabrous and scaleless on both surfaces, 

 except a few lanceolate scales of the midrib of the pinnules beneath, 

 the rachises pubescent, but without prickles or scales. Pinna' 

 oblong-lanceolate, the central ones the largest, 9-12 in. long, 2^-3 

 in. broad, shortly stalked, the lower smaller and more decidedly 

 petioled; pinnules lanceolate, sessile, §— |- in. broad, cut down in 

 the lower part to the rachis, and in the upper to a narrow wing 

 into close ligulate entire obtuse tertiary segments under a line 

 broad. Veins distinct, 6-7 -jugate, forked or simple. Sori costular, 

 not reaching the margin. Mount Singalan, 1800 metres. A near 

 ally of the common Indian A. latebrosa. 



434. Hymenophyllum dilatatum, Blume. Mount Singalan, 1700- 

 2000 metres. Three varieties, the type, H. Junghuhnii of Van- 

 denbosch, and a third, less compound, with a broad wing to the 

 main rachis. 



483. R. polyanthos, Sw. Mt. Singalan, 200 metres. 



484. H.jcwanicum, Spreng. Mt. Singalan, 1700 metres. 



• 452. H. Pieimvardtii, Vandenbosch Hymen. Javan. tab. 42. 

 This is evidently specifically distinct from II. javanicum, under 

 which it is noticed in ' Synopsis Filicum.' It differs from the 

 slender, much-crisped forms of that species by its toothed seg- 

 ments, and should be placed in section Leptucioniuw, in the neigh- 

 bourhood of II. denticulatum. Mt. Singalan, 1700 metres. 



440. II. tunbmhyense, Sm. Mt. Singalan, 1700 metres. New 

 to the Malay islands. 



487. 11. Xeesii, Hook. Mt. Singalan, 2000 metres. 



570. H. sabinafolium , Baker. Ayer Mancior, 300 metres. 

 Trichomanes muscoides, Sw. Mt. Singalan, 1700 metres. 

 436. T. diyitatum, Sw. Mt. Singalan, 2000 metres. 



571, 582. T. javanicum, Blume. Ayer Mancior, 360 metres. 

 486. T. auriculatum, Blume. Mt. Singalan, 1700 metres. 



453. T. radicans, Sw. Mt. Singalan, 1700-2000 metres. 



589. T. rigidum, Sw. Mt. Singalan, 1700 metres, and Ayer 

 Mancior, 860 metres. 



590. T. maximum, Blume. Ayer Mancior, 360 metres. 

 420. T. apiifolium, Presl. Mt. Singalan, 1700 metres. 



432. Diacalpe axpidioides, Blume. Mt. Singalan, 1700 metres. 



436, 487. DavaUia Spelling, Baker. Two varieties. Mt. Sin- 

 galan, 1700 metr j. 



/>. bidlata, Witll. Mt. Singalan, 1700 metres. 

 412. I). contii/Ha, Sw. Mt. Singalan, 1700 metr* . 

 o80. D. decurnns, Hook. Ayer Mancior, 360 metres. 



