American Species of Marchantia. 235 



Vera Cruz: Orizaba, 1855, F. Miiller 224^ (N. Y., listed by 

 Gottsche in Mex. Leverm. 268. 1863) ; Mirador, April, 1857, 

 C. Mohr (N. Y.) ; Orizaba, January, 1892, /. G. Smith (N. Y.). 



Jamaica: near Hardware Gap, July, 1903, A. IV. Evans 

 176 (Y.). 



Ecuador: near Bancs, R. Spruce (distributed in Hepaticae 

 Spruceanae). 



Bolivia: Sorata, February, 1886, H. H. Rusby 300 j in part 

 (N. Y., listed by Spruce as "AI. nova species?" in Mem. Torrey 

 Club 1 : 140. 1890). 



Chile: Renca, near Santiago, February, 1901, G. T. Hastings 

 J18 (U. S.) ; Straits of Magellan, 1866-67, -"^- Cunningham lOj, 

 IS5 (N. Y.) ; Punta Arenas, November, 1895, P. Dusen (N. Y., 

 first determined by Stephani as M. Berteroana; afterwards 

 listed as ''.1/. tahularis" in Bihang t. K. Sven. Vet.-Akad. Handl. 

 26^, Xo. 17:8. 1901) ; Cordilleras of Patagonia, February, 

 1897, /. B. Hatcher (Y., listed by the writer in Bull. Torrey 

 Club 25 : 424. 1898) ; Punta Arenas, February, 1906, R. Thaxter 

 64,65 (H., Y.). 



The following additional stations, recorded in the literature, 

 are likewise of interest: 



Costa Rica: Volcano of Poas. H. Pittier 6021 (listed by 

 Stephani in Bull. Soc. Bot. Belgiq.ue 31 : 180. 1892). 



Colombia: Bogota, 1859, A. Lindig ijoo, 1701, ijij (listed 

 by Gottsche in Ann. Sci. Nat. Bot. V. i : 186. 1864). 



Venezuela: Colonia Tovar, Moritz 134 (listed, but erro- 

 neously ascribed to Colombia, in Syn. Hep. 789. 1847; also listed 

 by Hampe in Linnaea 20: 333. 1847). 



Ecuador: Tunguragua, R. Spruce (listed in Trans. Bot. Soc. 

 Edinburgh 15:560. 1885). 



As its name implies, Marchantia poJymorpha is an exceedingly 

 variable species, and a full account of its numerous forms is 

 given by Nees von Esenbeck.^*' He recognizes two principal 

 varieties, A. Communis and B. Alpestris, and under each variety 

 he describes a series of sub-varieties and groups of more inferior 

 rank. A. communis is prevalent at lower altitudes but sometiines 

 ascends to higher elevations in sheltered localities; B. alpestris 

 is restricted to mountainous regions. A. communis is charac- 



'" Naturg. Europ. Leberm. 4:65-71. 1838. 



