42 SCANDINAVIANS AND 



Some Rocky Mountain Chri/sothamni, 1900. 

 Cryptogams of Wyoming, 1900. 



Contributions from the Rocky Mountain Herbarium, I — VII, 1900— '06. 

 Broom-grasses of Wyoming, 1901. 



An Analytical Key to Some of the Common Plants of the Rocky Mountain 

 Region, 1902. 



The Genus Hedysarum in the Rocky Mountains, 1902. 



Native Vines in Wyoming Homes, 1902. 



Psilostrophe, a Neglected Genus of Southwestern Plants, 1903. 



The Wheat-grasses of Wyoming 1903. 



Plantas Andrewsianae, 1904. 



New Plants from Nevada, I— 11, 1904 — '05. 



Plantse montrosenses, I [together with Kennedy], 1906. 



'Per c/ixet Rydberg was born the 6th of July, 1860, in Ohd Par- 

 ish, Westergotland, Sweden, and studied at the Royal Gymnasium 

 at Skara, where he was graduated in 1881. The following year, 

 he emigrated to America. From 1881 — 1893 he taught at Luther 

 Academy, Wahoo, Neb. He received his M. A. degree at the Uni- 

 versity of Nebraska in 1895 and his Ph. D. at Columbia Univer- 

 sity, New York, in 1898; was professor of natural sciences and 

 mathematics at Upsala College, Kennilworth, N. J., 1895 — 6 and 

 1897 — 9, and is since that time one of the curators of the New York 

 Botanical Garden. In the summers of 1891 — 93, 1895, and 1896 

 he was a field agent of the United States Department of Agricul- 

 ture and collected in western Nebraska, the Black Hills of South 

 Dakota, Montana, Idaho, Wyoming and Colorado. In 1897, 

 1900, and 1905 he collected for the New York Botanical Garden 

 in Montana, Colorado, California, and Utah. The list of his pub- 

 lications is omitted for obvious reasons. 



List of Papers Published by Dr. P. A. Rydberg,* 

 On the American Black Cottonwood, 1893. 

 Flora of Nebraska. Part 21, Resales, 1895. 

 New species of Phi/salis, 1895. 

 Flora of the Sandhills of Nebraska, 1895 

 Flora of the Black Hills of South Dakota, 1896. 

 The North American species of Phi/salis and related genera, 1896. 

 Notes on Potentilleae., I— VI, 1896—7. 

 Notes on two western plants, 1897. 

 Antennayia dioica and its North American allies, 1897. 

 Rarities from Montana, 1897. 



* Editor's Note. This paper would be lacking in a most important particular, if the writ- 

 ingg of its author were omitted. The editor, for that reason, takes the liberty to here insert as 

 complete a list as he has been able to secure of the published papers of Er. P. A. Kydberg to 

 the present date. J. A. XJdden. 



