THE FLORA OF NORTH AMERICA. 45 
Some Western Species of Agropyrum, 1902. 
Native and Introduced Saltbushes, 1904. 
Carl Oo Rosendahl was born the 24th of October at Spring 
Grove, Minnesota. His parents were Norwegians. He graduated 
at the University of Minnesota in 1901; was instructor in botany 
at the same institution, 1901—2; and took his Ph. D. at Berlin, 
Germany, in 1905. He has paid special attention to the flora of 
Minnesota. He has published the following: 
An Addition to the Knowledge of the Flora of Southeastern Minnesota, 1903. 
Die Nordamerikanischen Saxifraginew, 1903. 
Observation in Plant Distribution in the Renfrew District of Vancouver Island. 
Pehr Hjalmar Olson-Seffer was born at Ekenis, Finland, the 
14th September, 1873, became instructor in Swedish at Marie- 
hamn College in 1896 and of botany at Helsingfors College in 
1896, made a journey to Australia and migrated to America in 
1903. He became instructor in systematic botany at Leland 
Stanford University in 1903, and received his Ph. D.in 1904. In 
1905, he made a journey to Central America and in 1906—7 a 
journey around the world, in order to study rubber-culture and 
tropical agriculture. His specialty is Phytogeography and 
Economic Botany. He was fora short time the director of La 
Zaculpa Botanical Station and Plantation in Chiapas, Mexico, 
and was lately appointed Governmetal Comissioner of tropical 
agriculture of Mexico. He is the editor of the department of trop- 
ical agriculture in the Mexican Investos. 
Mexico — Rubber Experiment Station Prospectus, 1906. 
Ivar Tidestrom was born the 13th of September, 1865, in the 
Province of Nerike, Sweden, and came to America in 1881. From 
1890—5, he was a student and assistant of Prof. E. L. Greene, at 
the University of California, and later at the Catholic University 
of Washington, D. C., where he received his Ph. B. 
- Notes on Botrychium virginicum, 1905. 
Notes on the Gray Polypody, 1905. 
Elysium marianum [Ferns and Fern-allies of Maryland and Virginia}. 
J. Lunelf was born at Kalmar, Sweden, the 30th of March 
1851, received his license to practice medicine in Dakota in 1889, 
and is now a practicing physician at Leeds, North Dakota. He 
has made extensive botanical collections in Dakota and in Oregon. 
A few new plants discovered by him have been described by Proi. 
