6 D Canadian Arctic Expedition, 191S-18 



Rhizocarpon alboatrum (Hoffm.) Th. Fr. var. epipolium (Ach.) A. L. Sm. 

 Brit. Lich. II: p. 189 (1911). 

 On rocks, near Murray point, Wollaston peninsula. 



Rhizocarpon confervoides DC. Fl. Franc. II: p. 565 (1805). 

 Buellia petraea Tuck. Syn. pro parte. 



On rocks, 500-foot hill, 30 miles inland from Camden bay, Alaska. 

 Common and varied in the Arctic. 



Rhizocarpon geminatum (Flot.) Koerb. Syst. Lich. Germ. p. 279 (1855). 

 On rocks, Sadlerochit river, 25 miles inland from Camden bay, Alaska. 



Rhizocarpon geographicum (L.) DC. Fl. Franc. II: p. 365 (1805). 



On beach pebbles, Richardson island. Coronation gulf; on rocks, Bernard 

 harbour; on rocks, Wollaston peninsula; on rocks, 30 miles inland from Cam- 

 den bay, Alaska. 



Ever present in arctic and alpine regions, on boulders, pebbles, and even 

 sticks. It is the Buellia geographica of Tuck. Syn. 



CLADONIACEAE 



Cladonia sylvatica (L.) Hoffm. var. sylvestris Oed. in Fl. Dan. Illfasc. 9 (1770). 

 On earth, Chantry island, Bernard harbour. 



Cladonia sylvatica (L.) Hoffm. forma sphagnoides Flk. Clad. Comm. p. 168 

 (1828). 

 On earth, south coast of Coronation gulf. J. R. Cox and J. J. O'Neill. 



Cladonia bellidiflora (Arch.) Schaer. Lich. Helv. Spicgl. p. 21 (1823). 

 Tundra hummocks, Collinson point, Alaska. 



Cladonia bellidiflora (Ach.) Schaer. var. coccocephala (Ach.) Wain. Mon. 

 Clad. I: p. 204 (1887). 

 Tundra hummocks, Collinson point, Alaska. 



Cladonia coccifera (L.) Willd. Fl. Berol. p. 361 (1787). 



Tundra, Demarcation point, Alaska; tundra, Cockburn point, Dolphin 

 and Union strait. 



Cladonia coccifera (L.) Willd. var. pleurota (Flk.) Schaer. Lich. Helv. Spiclg. 

 p. 25 (1823). 

 Over mosses, Cockburn point; on tundra, Collinson point, Alaska. 



Cladonia pyxidata (L.) Fr. var. neglecta (Flk.) Mass. Sched. Crit. p. 82 (1855). 

 On earth, cape Bathurst. 



Cladonia pyxidata (L.) Fr. var. Pocillum (Ach.) Flot. Linnaea, 19 (1843). 

 Tundra, Demarcation point, Alaska; tundra, Bernard harbour. 



Cladonia carneola Fr. Lich. Eur. Ref. p. 233 (1831). 

 Tundra hummock, Collinson point, Alaska. 



Stereocaulon tomentosum Fr. Sched. Crit. p. 20 (1826). 

 On earth, Camden bay, Alaska. 



GYROPHORACEAE 



Gyrophora anthracina (Wulf.) Koerb. Syst. Lich. Germ. p. 99 (1855). 

 Umbilicaria, Tuck. Syn. 



On rocks, mouth of Rae's Mackenzie river, Wollaston peninsula. 

 A plant of common occurrence on all rock specimens from the region, but 

 in an immature condition. 



