26 ARKIV FOR BOTANIK. BAND 10. w:o 2. 
Tierra del Fuego: Cami, Isla Lagrelius, 17. 3. 1908 — 
hill above the Cami-camp, alpine region, 3. 3. 1908 
(= H. caespitosum Christ) — Fagnano, 21. 3. 1908. — 
Almirantazgo, P:to 
(very small: see fig 
South-Georgia: Roy 
Gomez, humid forest, 26. 2. 1908 
. 3 e—f). 
al Bay and Cumberland Bay, 
SKOTTSBERG n:r 274. 1902. 
Ed 
Fig. 3. Hymenophyllum | falklan- 
dicum. a—d from Cami:a, b 2 
leaves 1/1; e part of leaf */1; d so- 
rus (one valve removed), */1; ef 
small plant from Almirantazgo. 
Temperate South America is 
especially rich in large species of 
Hymenophyllum § Leptocioniwm 
v. d. B. (not Presl); some of these 
species are very closely related 
to each other and it is not always 
easy to determine them. Not a 
few specimens from different her- 
baria examined by me I have 
found wrongly determined. The 
most species vary considerably, 
and it may be doubted, if the 
species described by PHILIPPI from 
Southern Chile are really distinct. 
Dr. SKOTTSBERG has collected spe- 
cimens of all the species generally 
recognized, and after a detailed 
examination of these specimens 
and comparison with several others, I think the species can 
be distinguished by the characters given in the following key. 
I. Pinne only pinnatifid on the upper side. 
A. Segments simple or forked. Rachis pilose on the 
uppperside. 
1. ZH. pectinatum Cav. 
B. Segments narrower, again pinnatifid. Rachis gla- 
brous. 
p. 
H. secundum Hk. & Grev. 
II. Pinn® equally pinnatifid on both sides. 
A. Stipe glabrous, 
spinulose wing. 
furnished with a broad, crisped, 
a. Frond crisped or plicate. 
1. Valves 
dentato-ciliate at the rather ob- 
