THE FLORA OF NORTH AMERICA. 19 
he was a contemporary of Vahl’s. He made several journeys to 
different parts of the West Indian islands and to Surinam and 
Brazil. He corresponded with and sent numerous specimens to 
Vahl. 
Julias Philip Benjamin bon Rohr, an officer of the garrison 
of the Danish West Indies, served from 1757 as civil engineer, and 
from 1765 as superintendent of constructions at the government 
buildings and forts. In 1787—'91 he made a series of journeys in 
the interests of cotton culture, and died as lieutenant colonel in 
1793, on a journey from North America to Guinea. He was an 
ardent collector, and described 8 new genera of plants from St, 
Croix, Montserrat, Guadeloupe, and Martinique. His collections 
were afterwards elaborated by Vahl. At least one publication is 
from his hand: 
Plante-Slegter med tilféiede Anmerkninger af Hr Professor Vahl, 1792. 
Hans West was born in 1758 at Mesinge, on Hindsholm, Fyen, 
Denmark. In 1788—1800 he was the president of the school 
at Christianssted on St. Croix. In 1802 he was appointed minis- 
ter to Holland, and died at Cassel, returning from a journey to 
France 1811. He made in the Danish West Indies and Porto Rico 
extensive collections, which were sent to Vahl. He published the 
following, a work of 363 pages: 
Bidrag til Beskrivelse over Ste. Croix, med en kort Udsigt over St. Thomas, 
St. Jean, Tortola, Spanishtown og Crabeneiland, 1793. [Several new species are 
there published]. 
Martin Vahl was born at Bergen, Norway, the 10th of Octo- 
ber, 1749. He became lector at the Botanical Garden at Copen- 
hagen in 1779; director of the Botanical Garden in 1800; profes- 
at the university in 1801, and died the 24th of December, 1804. 
He studied under Linneus in 1769—’75, and edited Flora Danica, 
Vols. 6 and 7, in 1787—1803. He was specially interested in the 
flora of the West Indies. The plants he described were collected by 
von Rohr at St. Croix, Monserrat, Guadeloupe, and Martinique; by 
Dr. Ryan at Monserrat, St. Croix, and St.John; by Hans West on 
the Danish West Indies; by Mertfelt on Guadeloupe, and Dr. Pflug 
on St. Croix. : 
The following, referring to American plants, are from him: 
Flora Danica, Vols. 6 and 7, 1787—1803. 
Ecloge Americanee, 1796—1807 
En deel Kryptogamiske Planter fra St. Croix, 1802. 
