11 
The forms found in Arctic regions are: 
f. boreale Milde. Upright, unbranched below, branches simple 
with 3-toothed sheaths. 
f. decumbens C.F. W. Mey. Decumbent, much branched below. 
Branches at least partly branched and with 3—5 toothed sheaths. 
To this form belongs f. alpestre Wg. as a dwarf form. 
f. rivulare Huth. Fertile stem in the lower part more or less 
branched. To this form belong f. riparia Fr. and f. arctica Rupr 
as dwarf forms. 
f. campestre F. Schultz. Sterile frond with a small spike on the top. 
Am.: Kotzebue Sound, Arctic coast and islands, Hudson Strait, 
Grinnell Land to 81° 42’, Ellesmere Land, Baffin Land, West Green. 
60°—76° (1), East Greenl. 60°—63° 30’ (!)) and 70°—74° 30’ (!). Eur:.: 
Spitsbergen (!), Beeren Island, Jan Mayen, Samoyede Land, Habarowa, 
Waigats(!), Kolguev, Novaya Zemlya to 74°(!), Dolgoi Island. As.: Taimyr 
Peninsula, Mouths of the Yenissei, Boganida (!), Lena and Kolyma, Chuk- 
ches Land. 
Geogr. area: Northern North America, Iceland, Ferées, Europe, 
Northern Africa, Asia N. & W. to Himalaya, Cape Colony. 
Sect. IV. Aestivalia A. Br. Fertile and sterile stems equal, dull green, con- 
temporaneous. Spike black, obtuse. 
20. E. palustre L. 
Hook. Fl. Bor. Am. II, p. 269; Feilden, Fl. of Kolguev p.184. Fl. D.t. 1183. 
Stems upright, deeply furrowed with enlarged 6—10 toothed 
sheaths, branched; branches simple 4—6 ribbed with straight or 
slightly incumbent teeth, lowermost sheath of the branches black- 
whitish. 
Am.: Shores of the Arctic sea. Eur.: Kolguev. 
Geogr. area: Northern North America, Iceland, Feroées, Europe, 
Asia Minor, Caucasus, Northern Asia, Japan. 
21. E. limosum L. 
Ledeb. FI. Ross IV, p. 489; FI. D. t. 2925. E. fluviatile L; Fl. D. t. 1184. 
E. Heleocharis Ehrh. 
Stems upright, slightly many furrowed with appressed 10—20 
toothed sheaths, unbranched or usually producing ascending branches. 
Eur.: Samoyede Land, Kanin Peninsula. 
Geogr.area: North America, Iceland, Feerées, Europe, Northern Asia. 
Order IV. LYCOPODIACEAE Michx. (By O. GELERT). 
Only the following genus in the area: 
1. LYCOPODIUM L. 
A. Sterile leaves uniform crowded. 
a. Fertile leaves and sterile leaves uniform ..............- L. Selago. 
