59 111 



to texture, colour, pubescence and other characters. The type-specimen of P. tara- 

 potense and that referred to P. biseriale are fully identical or rather they belong 

 to the same specimen; P. tarapotense was described from the upper half of a 

 single leaf, of which the lower part with the stipe 7 years before was described 

 as P. biseriale. The explanation of this Baker's making a third species on the 

 same collector-number is however quite clear; on the sheet with the upper part 

 of a leaf described as P. tarapotense is affixed the lower part of a stipe with "large 

 brown lanceolate scales with a sudden grey edge" (Baker, 1. c. 505). This stipe 

 belongs to a species of Alsophila or Cyatheal 



D. platyloha is a distinct species closely allied to D. suhincisa but less cut. 

 It agrees with different forms of that collective species by the upper pinnæ being 

 broadly adnate to rachis with the lower basal segment decurrent, in the larger 

 pinnate-pinnatifid pinnæ the basal posterior lobe is similarly adnate and decurrent 

 on the costa. — Stipe 40— 50 cm long, trisulcate above, densely clothed below with 

 1 — I'/scm long, glossy, dark-brown, rigid, toothed, linear-lanceolate scales, upwards 

 like rachis fibrillose by similar but smaller scales and rather densely pubescent 

 by subulate, articulated hairs. Lamina up to 1 m long, lanceolate, grey-green or 

 brownish-green when dry, paler beneath, thickly membranous. Pinnæ up to 

 20 cm long, 2^1-2 — 4 cm broad, long-acuminate, the lower ones short-stalked, the 

 upper adnate to rachis. Costæ and costulæ above setose by antrorse, subulate, 

 articulated hairs, upperside otherwise glabrous; costæ rather hairy by patent hairs, 

 which are partlj' short and unicellular, partly longer and pluricellular, subulate, 

 leaf-tissue of underside very minutely and sparsely pubescent; scales of costæ very 

 few, hairlike, brown. Most pinnæ pinnatifid only, still in large specimens fully 

 pinnate at base, those of the basal pair with the basiscop side enlarged. Segments 

 or pinnules 6 — 10 mm broad, obtuse, entire or deeply lobed, the posterior basal 

 lobe decurrent and adnate to costa. Veins once forked in the entire segments, 

 pinnate in the tertiary lobes not reaching the J margin. Sori small, exindusiate, 

 nearer the edge than the midrib, generally on the middle of the anterior branch 

 of the forked vein, or near the apex of the simple veins of the tertiary lobes, 2 — 3 

 to each lobe. 



52. Dryopteris biserialis (Bak.) C. Chr. Index 254. 1905. 

 Syn. Polypodium biseriale Bak. Syn. 309. 1867, pro parte. 



Nephrodium sitbglabrum Sodiro, Cr. vase. quit. 259. 1893. 

 Dryopteris subglabra C. Chr. Ind. 295. 1905. 

 Type from Ecuador, Mt. Tunguragua, Spruce sine num. (Kew!); prope San 

 Nicolas, Sodiro (C). 



As stated above the Peruvian specimen (Spruce 4656) referred to P. biseriale 

 by Baker belongs to the preceding species. I regard here the two other specimens 

 which in Kew are referred to P. biseriale by Baker as the type-specimens of a 

 species, for which I use Baker's name. It is a species closely allied to P.platyloba; 



15* 



