THE FLORA OF NORTH AMERICA. 35 
ago, Jamaica, Panama and Curagao in 1891—98, and made ex- 
tensive collections. The following publications are from his hand: 
Erindringer fra Mexico, 1869. 
St. Croix’s Flora, 1876. 
Rhizophora Mangle L., 1877. 
Reynosia Griseb. En hidtil ufuldstandig kjendt Slegt af Rhamnaceernes Fa- 
milie, 1877. 
Naturen paa de Dansk-Vestindiske Oer. 1878. 
The Flora of St. Croix and the Virgin Islands, 1879. 
Et Besdg paa Oen Dominica, 1880. 
Die Poyale des dstlichen Porto Rico, 1882. 
Porto Rico, 1883. 
Reise in das Innere yon Sto. Domingo, 1888. 
Flora of the Bahamas, 1892 
Supplement til St. Croix’s og Jomfrudernes Flora, 1889. 
Botanical Exploration to Cuba, 1890. 
Die Insel Tobago, 1893. 
Veit Brecher Wittrock (See United States and Canada, page 26). 
Carl Emil Hansen Ostenfeld (See Greenland and Arctic America, 
page 45). 3 
Carl Fredrik Otto Nordstedt (See Greenland, page 28). 
William Nylander was born at Uleaborg, Finland, Jan. 3, 1822, 
received the degree Ph. Cand. in 1843 and that of M. D. in 1847. 
He lived in France from 1851 to 1857, when he was appointed 
professor at the University of Helsingfors, Finland. He returned 
to France in 1863 and died in Paris the 29th of March, 1899. He 
was perhaps the most prominent lichenologist of the world and 
was the author of numerous publications. Those relating to 
North America are the following: 
Synopsis methodica Lichenum omnium hucusque cognitorum, 1858—’59- 
Collectio lichenum ex insula Cuba, 1866. ; 
Enumeration des Lichenes récoltés par M. T. Husnot aux Antilles francaises, 
1868. 
Cirea Pyrenocarpeos in Cuba collectos a C. Wright, 187 6. 
Lichenes nonnulli insulz St. Thomas Antillarum, 1880 
Enumeratio lichenum Freti Behringii, 1888. ; 
Mexicanas plantas nuper a colletoribus expeditionis scientifice [together 
with E. Fournier and E. : 
Lichenes exotici a W. Nylander descripti 1892. 
Nils Gustaf Lagerheim was born at Stockholm the 18th of Octo- 
ber, 1860. In 1889 he became conservator at the museum at 
