152 
Volume 1 of “ The Cactaceae, Descriptions and Illustrations 
of Plants of the Cactus Family,” by N. L. Britton and J. N. 
Rose, was published June 21, 1919, and will be followed by three 
additional volumes before the monograph is completed. The 
book is a quarto, printed in the usual style of the publications 
from the Carnegie Institution of Washington, of which this is 
number 248. It is illustrated by 5 plates in photogravure, 3 in 
half-tone, and 28 in color, and by 302 text figures in half-tone or 
zinc. The first two of the tribes of Cactaceae are included: 
Pereskieae, with a single genus and 19 species, and Opuntieae, 
with 7 genera and 283 species, of which 254 are comprised within 
the genus Opuntia. 
‘ Mr. Henry John Elwes, F.R.S., of Colesborne Park, near 
Cheltenham, Gloucestershire, spent portions of several days at 
the Garden about the middle of June, sailing for England on 
June 16. Mr. Elwes has been interested in botany for many 
years, and is well known to the scientific world not only by his 
numerous papers scattered in the proceedings of learned societies, 
but by his magnificent monograph of the genus Lilium (1877- 
1880), and the great work on the trees of Great Britain and 
Ireland (seven volumes, 1906-1915) prepared by him in collabor- 
ation with Dr. Augustine Henry. The monograph of Lilium 
is now about forty years old, and Mr. Elwes is at work upon a 
supplement to it. 
The June Biological Trip of the Evander Childs High School 
to the New York Botanical Garden took place on Thursday, 
June 19, under the leadership of Mr. Paul B. Mann and three of 
his teachers, assisted by eight members of the Garden staff. 
The pupils. 300 in number, assembled at the entrance to Con- 
servatory Range 1 and were guided through the fifteen houses of 
this range in groups of 30. Trees and various kinds of her- 
baceous plants were then studied in the valley east of the Con- 
servatories, and plant products on the main floor of the Museum 
Building. Mr. George E. Hewitt gave an illustrated lecture on 
the subject of forestry, which was a fitting climax to a very 
successful and enjoyable occasion. 
