57 
109 
lower pinne nearly or quite free, lobato-pinnatifid. Veins about 7—8 to a side, once 
or twice forked, the branches occasionally anastomosing, not reaching the margin. 
Sori at the base of the anterior branch of the vein, small, a little oblong exindusiate. 
In general habit, colour and: texture very like D. refulgens but totally different 
in venation and scales and 
much more deeply cut. 
49. Dryopteris yungensis 
Christ et Hos. ; Rosenstock 
in Fletde. Repert. 5: 234. 
1908. — Fig. 11a. 
Type from Bolivia: 
Yungas australis, Sirapuya 
pr. Yanacachi, 2000 m, leg. 
O. BucHTIEN nr. 493 (auth. 
specim. in RB!) 
Closely related to D. 
honesta and perhaps not spe- 
cifically distinct. It differs 
by the position of the sori, 
which are placed at the 
middle of the anterior branch 
of the forked vein, and by 
the structure of the scales 
of rachis and costz beneath, 
which are broader, yellowish, 
the cells with large, clear 
lumina (fig. 3). In all other 
respects the two species are 
nearly identical. 
50. Dryopteris leptosora 
C. Chr. Index 274. 1905. — 
Fig. 11d. 
Syn. Nephrodium micro- 
sorumHook.spec. 
fil. 4: 106. 1862; 
Syn. fil. 271. 
Dryopteris microso- 
ra O. Ktze. Rev. 
2: 813. 1891. 

men 
Fig. 11. a. D. yungensis Christ. et Ros. (orig.. — b. D. honesta 
(Kze.) C. Chr. (Spruce 4742) — c. D. platyloba (Bak.) C. Chr. (orig.) — 
d. D. leptosora C. Chr., two segments seen from the underside and 
one seen form above (orig. — All pinne >< ‘/;, segments » 1!/». 
D. K. D. Vidensk. Selsk, Skr., 7. Rekke, naturvidensk. og mathem, Afd. X. 2. 15 
