81 
wo 
Je) 
This is a large species with subdimorphous leaves, the sterile ones being much 
larger than the fertile. Sterile lamina up to 50cm. long, 40 cm. broad, truncate 
at base, upwards gradually narrowed to the pinnatifid apex. Pinnz 15—20-jugate, 
shortstalked, 15—20 cm. long, 3 cm. broad, the lower base bluntly rounded, the 
upper one truncate and with a broad, obtuse auricle; margins broadly and shal- 
lowly serrulate, towards the submucronate apex more distinctly serrate. "Texture 
membranous to firmly papyraceous, colour fresh-green, paler beneath. Stipe, rachis 
and coste beneath sparsely clothed with reddish or blackish small scales. Veins 
in groups of 3—4, upcurved, not reaching the margin, free. — Fertile ,lamina 
similar, but the pinnez only 10—12 cm. long by 1!/»—1?/4 em. broad. Sori in the 
lower half of the vein, in most specimens apparently exindusiate, but in a single 
of FENDLER's Trinidad-specimens the sori are covered by large, circular, peltate, 
glabrous, coriaceous indusia; a single indusium is found in the type-specimen. 
D. sancli-gabrieli can with certainty be referred to Stigmatopteris, differing 
from the general type by its peltate indusia. 
28. Dryopteris subobliquata (Hook.) O. Ktze. Rev. 2: 813, 1891; 
C. Chr. Index 296. — Fig. 2 b. 
Syn. Polypodium subobliquatum Hk. spec. 4: 240, 1862. 
Nephrodium subobliquatum Bak. Syn. 261, 1867. 
Type from Surinam, Hosrmann nr. 15 (Kew !). 
Closely related to the preceding species, but easily recognizable by several 
characters. Leaf generally coriaceous, entirely glabrous, lamina lanceolate, about 
40 cm. long with 10—15 pairs of rather remote, subopposite, short-stalked pinnze, 
which are all alike, 12 cm. long by 2!4—3 cm. broad, the lower base shortly 
cuneate, the upper one truncate, scarcely auricled, the margins lobed about half- 
way down to the midrib into oblong, obtuse, entire segments; apex of pinnz 
mucronate. Veins simple, free, 3—4 to a side, short, not reaching the margin. 
Sori small, furnished with an early falling, large, coriaceous, glabrous, peltate in- 
dusium. 
I call here this distinct species D. subobliquata, although I have no doubt that 
it is identical with Aspidium guianense Kl., Linnaea 20: 364, 1847; Peltochlaena 
nephrodiiformis Fée, Gen. 289 is probably the same. I have, however, not seen the 
original specimen of A. guianense, which commonly is referred as a subspecies to 
Polystichum abbreviatum (Schrad.), and I shall not here create a new combination 
of name, mainly because the position of the species in Dryopteris is very question- 
able. It is possible that it may be a free-veined form of Polystichum abbreviatum, 
still I think it can be regarded as a distinct species forming a connecting link 
between D. sancti-gabrieli and Polyst. abbreviatum. Its systematic position will na- 
turally be in Stigmatopteris. Some of the specimens seen have distinct immersed 
glands. 
