12 
b. Fertile leaves different from sterile leaves and combined in a spike. 
1. Spikes solitary sessile in the top of the branches. Leaves pointed 
L. annotinum. 
2. Spikes stalked. Leaves incurved, pointed by a long bristle L. clavatum. 
B. Sterile leaves unequal, on the creeping shoots crowded, on the upright shoots 
in 4 ranks. 
a. Upright shoots more or less flat, spikes stalked ...... L. complanatum. 
b. Upright shoots evidently 4-edged, spikes sessile. ......... L. alpinum. 
22. L. Selago L. 
Ambronn, Cumberland Gulf p. 97; Hook. FI. Bor. Am. II, p. 266; Hart, 
Brit. Pol. Exped. p.143; Lge. Consp. Fl. Groenl. p. 183; Peary, Auxil. Exped. 
App. C. p. 8; Nath., Spetsb. Karly. p. 39; Feilden, Fl. of Kolguev p. 184, 
Nov. Zemlya p. 25; Th. Holm, Nov. Zeml. Veget. p. 26; Ledeb. Fl. Ross. IV, 
p. 496; Trauty. Syl]. PL Sib. bor. orient. p. 545, Pl. Sib. bor. p. 145; Schmidt, 
Fl. Jeniss. arct. p. 150; Fl. D. t. 104. 
Stem erect, dichotomous, leaves linear lanceolate, acuminate, 
crowded. No spikes but some of the unallered leaves on different 
parts of the stem bear sporangia. 
The f. appressa Desy. (= y. alpestre Berl.) is a form scarcely 
differing with shorter more appressed leaves. 
Am.: Kotzebue Sound, Arctic coast and islands (!), Hudson Strait: 
Cumberland Gulf, Ellesmere Land 78° 56", West Greenl. 60°—76° (!), East 
Greenl. 60°—73° 30’ (!). Eur.: Beeren Island (!), Spitsbergen (!), Novaya 
Zemlya to 74°(!), Kolguev (!), Waigats, Samoyede Land, Dolgoi Island. 
As.: Mouth of the Yenissei and Lena, Chukches Land (!). 
Geogr. area: North and South America, Iceland, Faerées, Atlantic 
islands, Europe, Asia Minor, Caucasus, Northern Asia. 
23. L. annotinum L. 
Ledeb. FL. Ross. IV, p. 498; Lge. Consp. Fl. Groenl. p. 183; Taylor, Pl. 
coll. at Davis Str. and Balff. Bay p. 87. Fl. D. t. 127. L. annotinum y. alpestre 
Hartm., Fl. D. 1. 2984. 
Stem prostrate with ascending branches, leaves linear-lan- 
ceolate, scattered, in the typical form spreading, entire or minutely 
serrulate, acute. Spikes solitary in the top of the branches, oblong, 
cylindrical, sessile. 
The typical form is seldom in Arctic regions, generally there 
the f. pungens Desv. (= y. alpestre Hartm.) occurs. This form has 
shorter and more rigid pointed, erect or appressed leaves. 
Am.: Kotzebue Sound, Baffin Land at Cumberland Gulf, West 
Greenl. 60°—72° 48’ (!), East Greenl. 60°—61° (!) and 70° (!). Eur.: 
Samoyede Land. 
Geogr. area: North America, Iceland, Feerées, North and Central 
Europe, Appenines, Northern Asia, Himalaya. 
23. L. clavatum L. 
Lge. Consp. Fl. Groenl. p. 184. FI. D. t. 126. 
