4 
Order Il. POLYPODIACEAE R. Br. (By O. GELERT). 
a, Clusters nearly circular without an indusium. 
1. Fronds long stalked, nearly triangular in circumference 
Aspidium Sect. Phegopteris. 
2. Fronds short stalked, lanceolate in circumference .... Athyrium alpestre. 
b. Clusters with a distinct indusium. 
1 Glusters#linearorsoblongirs, muse aise sete) ile sis) t) ) se seater Asplenium. 
2. Clusters nearly circular. 
a. Indusium attached over the cluster, circular or reniform 
Aspidium Sect. Lastrea and Sect. Hypopeltis. 
8. Indusium attached under the cluster, unilateral ...... Cystopteris. 
y. Indusium attached under the cluster, divided in capillary segments. 
Woodsia. 
1. ATHYRIUM Roth. 
5. A. alpestre (Hoppe) Ryland. 
Aschers. & Grabner Syn. I p. 13; Lge. Consp. Fl. Groenl. p. 305; Poly- 
podium alpestre Hoppe, Lge. 1. c. p. 186; P. rheeticum (L. p. pt.) Vill. FI. 
D. t. 2607. 
Fronds dark green, 2—3 pinnate, lanceolate in circumference, 
with short stalks having brown scales. Clusters at last circular, 
indusium rudimentary. Rhizome thick, ascending. Fronds about 
30 cm. long. Much like A. Filix foemina, but separated by more 
obtuse pinnze, circular clusters without conspicuons indusium. 
Am.: W. Greenl. 60° (!), East Greenl. 60°—61° (1). 
Geogr. area: British Columbia?, Iceland, Scotland, Scandinavia, 
Russian Lapland, Pyrenees, Central European Mountains, The Alps, Cau- 
casus, Asia Minor. 
2. ASPIDIUM Sw. 
Sect. I. Phegopteris Fée. Without indusium. 
6. A. Dryopteris (L.) Baumg. 
Aschers. & Grabner Syn. I pr. 21. Polypodium Dryopteris L., Lge. 
Consp. Fl. Groenl. p. 185. Fl. D. t. 1943. 
Rhizome thin and creeping. Fronds long stalked, glabrous, 
ternate, divisions pinnate, pinnz pinnatifid, clusters near the margin. 
Am.: West. Greenl. 60°—69° 15’ (!). East Greenl. 60°—63° (!). 
Geogr. area. North America, Iceland, Feerées, Europe, Asia Minor, 
Northern Asia, Northwestern Himalaya. 
7. A. Phegopteris (L.) Baumg. 
Aschers. & Grabner, Syn. I p. 23; Polypodium Phegopteris L., Lge. 
Consp. Fl. Groenl. p. 185. Fl. D. t. 1241. 
Rhizome creeping. Fronds long stalked, hairy, in circumfe- 
rence oblong-triangular, pinnate, pinnz pinnatifid. Lower pair of 
pinne deflexed. Clusters near the margin. 
Am.: West. Greenl. 60°—65° 40’ (!), East Greenl. 60°—63° (!). 
