95 147 
the base of the stipe. Pinnz opposite, coriaceous, like rachis quite glabrous, 10— 
12 em long, 2 cm broad, arcuate-ascending, the lower ones at base with a pair of 
glanduliform free pinnule and above them a pair of auriculiform segments, basal 
segments of medial pinnz reduced. Segments 5—6 mm broad, acute, falcate, their 
margins revolute. Veins not very distinct, 10—12-jugate, simple. The specimen 
seen is sterile; according to Sopiro the sori are near the margin and furnished 
with a deciduous indusium. 
Differs from the allied species (D. rudis, D. piloso-hispida etc.) by its entirely 
glabrous leaf and the pale underside. 
152. Dryopteris canelensis Rosenstock, Fedde, Repert. 7: 302, 1909. 
Type from Ecuador, in silva Canelos, Spruce (RB !). 
A species allied to D. rudis but well marked by its short and narrow pinne, 
coriaceous texture, very oblique segments with about 11 pairs of veins and its very 
tomentose rachis. 
153. D. nervosa (Kl.) C. Chr., Revision nr. 75. 
Area: British Guiana, Costa Rica; Panama, Maxow nr. 4966 (W). 
Rizome creeping. Much like a glabrescent form of D. rudis and perhaps it 
should be united with that species. 
154. D. rudis (Kze.) C. Chr. Revision nr. 73 fig. 48. Smiths. Misc. Coll. 52: 391. 
Area: Mexico along Andes to Ecuador and Bolivia. Jamaica (P. cfenoides 
Jenm.). 
A widely spread and rather uniform species, of which I have recently recei- 
ved several specimens, f. inst. from Panama, Maxon nr. 5675 (W) and Bolivia, 
BucurrEN nr. 494 (R). It varies mainly in texture and pubescence; generally the 
whole lamina is rather densely setose by stiff hairs and the coste beneath are 
furnished with some brown scales, still the upper surface can be nearly quite 
glabrous and such specimens are scarcely to distinguish from D. nervosa by any other 
character than the supramedial sori. This more glabrous and generally smaller 
form is D. lasiopteris (Sod.) C. Chr. Revision nr. 69 fig. 45, which I now do not 
hesitate to reduce to a synonym of D. rudis. About the same form, still with fewer 
(9) veins is 
Dryopteris caeca Rosenstock, Fedde, Repert. 7: 302. 1909, from Ecuador, 
SPRUCE nr. 5261 (RB). 
Aspidium subdecussatum Christ, Bull. L'Herb. Boiss. II. 4: 960. 1904. 
Dryopleris subdecussata C. Chr. Index 295. 1905. 
Costa Rica, Arrano nr. 16556 (C) is rather typical D. rudis. 
Aspidium exsudans var. myriocarpum Fourn. Mex. Plant. 1; 94 is also, accor- 
ding to specimens in Herb. Mus. Paris so named by FounNIER, a synonym of the 
present species. 
