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No. 55. Studies on the Rocky Mountain Flora — XI, by 
Per Axel Rydberg. 
No. 56. The Polyporaceae of North America— VIII, 
Hapalopilus, Pycnoporus and new monotypic genera, by 
William Alphonso Murrill. 
No. 57. Studies in the Asclepiadaceae— VIII, A new 
species of Asclepias from Kansas and two possible hybrids 
from New York, by Anna Murray Vail. 
No. 58. Relationship of Macrophoma and Diplodia, by 
Julia T. Emerson. 
No. 59. Studies on the Rocky Mountain Flora — XII, by 
Per Axel Rydberg. 
No. 60. The Polyporaceae of North America —IX, /no- 
notus, Sesta and monotypic genera, by William Alphonso 
Murrill. 
No. 61. On P%sonia obtusata and its allies, by N. L. 
Britton. 
Lectures 
Two series of public lectures have been given, one in the 
spring and one in the autumn. Cards are sent to all mem- 
bers and an invitation is given to meet the Director and staff 
for a tour of an hour and a half around the grounds, planta- 
tions, and in the conservatories. The attendance at these 
lectures has been very gratifying, although unfavorable 
weather has reduced the number present in some instances. 
The full list of subjects and lecturers is given below. 
April 30. ‘‘ Japan, the Land of Lacquer and Bamboo,” by 
Dr. C. F. Millspaugh. 
May 7. ‘‘ The Form, Habits and Relationships of the Cac- 
tuses,” by Dr. N. L. Britton. 
May 14. ‘The Vegetation of the Delta of the Colorado 
River, and of Baja California,” by Dr. D. T. MacDougal. 
May 21. ‘‘ Explorations on the Yukon River, Alaska,” by 
Dr. Arthur Hollick. 
May 28. ‘* Arctic and Alpine Plants,” by Professor F. E. 
Lloyd. 
June 4. ‘¢Carnivorous Plants,” by Professor H. M. 
Richards. 
