117 169 
185. Dryopteris densisora C. Chr. Ind. 261. 1905. 
Syn. Aspidium costale Mett., Kuhn, Linnaea 36: 111. 1869. 
Nephrodium costale Bak. Syn. 495. 1874. 
Type from Venezuela, FENDLER nr. 476 (not seen, not found at Kew). 
Although I have not seen an authentical specimen I do not hesitate to refer to 
this species several specimens from Costa Rica, which exactly correspond to the 
original description. Most of these specimens I have previously determined as D. 
Leprieurii var. palmensis (Christ) considering them not specifically different from 
D. Leprieurii and using a MS name of Dr. CunisT for the variety. 
D. densisora is very closely allied to D. Leprieurii and it is perhaps only a 
variety of it. It differs by the glabrous surfaces, being sparsely strigose along the 
coste only, and especially by the inframedial or subcostular sori, which are fur- 
nished with a very large, subbullate and subglabrous indusium. Veins about 12- 
jugate, scarcely raised above. As to all other characters it agrees with D. Leprieurii. 
Costa Rica: La Palma, Tonpuz nr. 12576 (C, W), WERCKLÉ (C, CC), A. et C. Brave nr. 347 (R). 
Panama: Maxon nr. 5605 (W). 
186. Dryopteris valdepilosa (Bak.) C. Chr. Ind. 299. 1905. — Fig 22. 
Syn. Nephrodium valdepilosum Bak. Journ. Bot. 1881: 204. 
Type from Colombia, province of Antioquia, KALBREYER nr. 1347 and 1871 
(Kew!) and very typical speci- 
mens were collected in Costa 
Rica by J. J. Cooper (W). 
A most distinct species, re- 
markable by its stipe and rachis 
being very densely clothed with 
long, soft, patent light brown, 
pluricellular hairs; similar hairs 
but shorter and fewer are found 
on the costz, costule and veins 
of both sides. These long hairs 
are (as seen in nr. 1871) decidu- 
ous and under them is a rather p. valdepilosa (Bak.) C. Chr. (KALBREYER 1347). a. pinna of 
dense layer of very short, uni- sterile leaf >< ‘/s; b. two segments from the underside and 
c. one segment seen from above of the same pinna, »« 1!/»; 
d. fragment of the same from the upperside >< 4; e. pinna 
of fertile leaf >< */5; f. segments of the same, >< 1!/». 

cellular hairs; coste above also 
with many long but antrorse 
hairs; leaf-tissue of both surfaces 
pubescent by minute adpressed hairs. Fronds dimorphous, if the fertile frond of 
nr. 1347 really belongs to the same plant as the sterile one. Sterile lamina on 
a stipe 20 cm long, lanceolate, 40—50 cm long, 15—20 cm broad at the middle, mem- 
branous, greyish green. Pinnz close, sessile, lower ones much reflexed, scarcely 
