51 
MacDougal, assisted by Dr. G. H. Shull, Miss A. M. Vail and 
Dr. . Sm This paper is issued as No. 24 of the series of 
the institution, and is the second accredited . the station for 
Experimental Evolution at Cold Spring Harbor. The results 
of observations of cultures of the evening-primroses carried on 
in the New York Botanical Garden are described, and include 
observations on the origin and characteristics of new species, 
together with a description of the behavior of these plants in 
hybridizations. 
. N. Rose, of the U. S. National Museum, who is 
cooperating with Dr. N. L. Britton in investigations of the 
Crassulaceae and of the cacti, has recently been promoted to the 
position of Associate Curator in charge of the herbarium ‘of that 
institution 
The Plant World for 1905, which is now under the editor- 
Ship of Professor F. E. Lloyd, contains an article on ‘“‘ Physio- 
logical Drought Relating to Gardening,” by Professor Balfour, 
Regius Keeper of the Royal Botanic Garden, Edinburgh, which 
is of great interest to horticulturists. 
oyd, 
The same number of this periodical contains the first instal- 
ment of ‘‘A Summer in the Tropics,’ by Miss M. M. Brackett, 
describing a season ia at the Cinchona Laboratory of the 
ork Botanical Garde 
The study of the ounce collections of Mr. Herbert H. 
Smith in a Santa Marta region of Colombia, made by Dr. H 
H. Rusby, continued at Kew during the summer of 1904, shows 
interesting relations between that and neighboring floras. It is 
believed that no botanical oe from South America has 
ever exhibited such wide re nships. Perhaps the most strik- 
ing similarity is to the St. ae flora, many of the species of 
Mr. Smith’s nigee on that island being duplicated in his 
Santa Marta sets. Quite a large number of the species of Dr. 
Trimble on < Upper Amazon, and avery large number of 
those of Jamison and others in Ecuador are represented, and 
Central America and Mexican species are also numerous. Ven- 
ezuela and Guiana are closely related, as would naturally be ex- 
pected. Bolivian species are almost without representation. 
