THE FLORA OF NORTH AMERICA. 29 



and has been since 1871 the geologist of the Danisli explorations 

 of Greenland. He received the honorary degree of Pli. D. in 1894. 

 He made two expeditions to Greenland, one in 187() to Juliane- 

 haab, and another in 1878— '80 to North Greenland. On the first 

 Docent Kornerup was the botanist; during the second Steenstrup 

 made the botanical collections himself. 



Gastav Frederik Holm was born in Copenhagen in IMO and be- 

 came captain in the marine in 1885, He partook in the expedi- 

 tion under Steenstrup in 1876. He led an expedition to South 

 Greenland in 1880— '81, and another to East Greenland in 1883 

 — '85. He published, 



Den Danske Konbaadsexpeditionen til Gronland, 1883— 'So. 



C Petersen", Ph. Cand., was the botanist of the expedition to 

 South Greenland in 1880 under Captain G. F. Holm. 



Jens Arnold Diderich Jensen was born at Flensborg the 24th of 

 July, 1849, became captain in the marine in 1886, bureau-chief of 

 the marine department in 1887, and retired in 1892. He made 

 several journeys to Greenland: In 1877 to South Greenland, in 

 1878 to Godthaab and Fredrikshaab, in 1879, 1884 and 1885 

 to Holstenborg, Suckertoppen, and Godthaab. On the second of 

 these journe,ys he was accompanied by Kornerup, and on the last 

 by Dr. Soren Hansen, who acted as botanists. On the others he 

 collected some plants himself. 



A^. Sytonv, Ph. Cand., was the botanist of the expedition to 

 North Greenland in 1879 — '80 under Lieut. R. Hammer, and of 

 that to South Greenland in 1883 under Captain Holm. 



P. Eberttn and A'^. Knutson, Ph. Cand., were thebotanists of the 

 expedition of 1883— '85, under Captain Holm. 



Carl Hartviff Ryder was born the the 12th of September, 1858, 

 at Copenhagen, became lieutenant in the marine in 1879, and 

 captain in 1897. He partook in Poulsen's expedition to Godt- 

 haab and Suckertoppen in 1885, made cme to Upernavik in 1886, 

 and another to the east coast of Greenland in 1891— '92, during 

 which he himself made extensive botanical collections. 



Johannes Eugenius Buelo'w Warmm^ (See West Indies, page 48), 

 and 



• I have not been able to give acy biographical sketch either of him or of several of the fol- 

 lowing collectors, as those volumes of Meddelelser om OrOnUmd in which the account of their work 

 published, are not found in the libraries of the City uf New York. 



