THE FLORA OF NORTH AMERICA. 47 
This place he was forced to leave on account of poor health. He 
then received a position in the Botanical Museum at Copenhagen. 
Here he worked especially on the arctic collection together with 
Ostenfeld. Their aim was to publish an Arctic Flora. The work 
has been continued by Ostenfeld, and the first fascicle has been 
published. In 1897, Gelert made a journey to the Canary Islands. 
He died the 20th of March, 1899, at Copenhagen. 
Notes on Arctic Plants, I [Crucifers], 1897. 
Per Dusen was born at Wimmerby, Sweden, the 4th of August, 
1855. He is a civil engineer by profession and has made the 
following journeys, mostly in the interest of botany: to Kamerum 
in 1890—2, Terra del Fuego in 1896—7, East Greenland (with 
Nathorst) in 1899, and Patagonia 1904—5. Heis an amanuen- 
sis at the Museum of Rio Janeiro since 1901. 
Beitrage zur Laubmoosflora Ostgrénlands und der Insel Jan Mayen, 1901. 
Nagra viktiga vaxtfynd fran nordéstra Grénland, 1901. 
Zur Kentniss der Gefiisspflanzen Ostgrénlands, 1901. 
Herman Georg Simmons was born at Dalby, Skane, Sweden, the 
16th of August 1866, became Ph. Cand. in 1892, and amanuensis 
at the Botanical Museum at Lund in 1893. He was the botanist 
of Sverdrup’s expedition to Ellesmereland (west of Greenland) in 
1898—1902. The following are his publications: 
Preliminary Report on the Work of the Second Norwegian Polar Expedition 
903. 
Flora of Ellesmereland, Part I, 190... 
Carl Emil Hansen Ostenfeld was born at Randers, Denmark, 
August 3rd, 1873. He has been inspector of the Botanical Muse- 
um at Copenhagen since 1900. He has made as his specialty 
the study of the flora of arctic regions. The following publica- 
tions referring to America are from his hand: 
Om inslzbte Planter fra Ivigtut (Syd Grénland), 1902. 
Flora Arctica, Part I, 1902. 
Halophila Aschersonii [native of St. Croix], 1902. 
Hago Gustaf Adolf Dahlstedf was born at St. Lars, Ostergit- 
land, Sweden, the 8th of February, 1856, became amanuensis at 
the Botanical Garden at Stockholm in 1890 and at the Botanical 
Museum in 1892—4. He is a specialist on several Cichoriaceous 
genera, especially Hieracium. He has furnished some contribu- 
tions to the knowledge of the North American Flora. He wrote 
