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, l.c. 505). This stipe 
belongs to a species of Alsophila or Cyathea! 
D. platyloba is a distinct species closely allied to D. subincisa bul less cut. 
It agrees with different forms of that collective species by the upper pinne being 
broadly adnate to rachis with the lower basal segment decurrent, in the larger 
pinnate-pinnatifid pinnz the basal posterior lobe is similarly adnate and decurrent 
on the costa. — Stipe 40—50 em long, trisulcate above, densely clothed below with 
1—1/: cm 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. Pinnze up to 
20 cm long, 2'/2—4 cm broad, long-acuminate, the lower ones short-stalked, the 
upper adnate to rachis. Coste and costule above setose by antrorse, subulate, 
articulated hairs, upperside otherwise glabrous; coste rather hairy by patent hairs, 
which are partly short and unicellular, partly longer and pluricellular, subulate, 
leaf-tissue of underside very minutely and sparsely pubescent; scales of costze very 
few, hairlike, brown. Most pinnz 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{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 subglabrum Sodiro, Cr. vasc. quit. 259. 1893. 
Dryopteris subglabra C. Chr. Ind. 295. 1905. 
Type from Ecuador, Mt. Tunguragua, Spruce sine num. (Kew!); prope San 
Nicolas, Soprno (C). 
As stated above the Peruvian specimen (Spruce 4656) referred to P. biseriale 
by BaxEn 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* 
