250 THE CACTACEAE. 
collected many cacti, especially species of Neomammillaria, duplicating many of the 
important discoveries made by Dr. Rose on the same islands in 1911. He has also sent us 
cacti from Colorado. 
Professor Fortunato L. Herrera has sent some very interesting plants from eastern 
Peru, especially from about his home at Cuzco. 
Mr. Robert Runyon has collected extensively in southern Texas and northern Mexico 
and has supplemented his specimens with some very beautiful photographs. 
Dr. L. H. Bailey and his daughter, Miss Ethel Zoe Bailey, obtained valuable cacti 
from Venezuela, especially from the region about Ciudad Bolivar, on the Orinoco, in 1921. 
Mr. W. B. Alexander was sent to Argentina by the Australian Government in 1920 
and 1921 in search of enemies of the weed prickly pears and there made many important 
observations, especially on the genus Opuntia. He sent us two undescribed species. 
Dr. B. P. Reko, a very diligent collector, has sent many cacti from Mexico, especially 
from Oaxaca, including several new to science. 
Sefior Octavio Solis, in charge of the cactus garden belonging to the Mexican Govern- 
ment in the City of Mexico, has sent many living plants from his country, especially of the 
genus Neomammillaria. To him we have dedicated the genus Solisia. 
Sefior J. G. Ortega has collected extensively on the west coast of Mexico, especially 
in the state of Sinaloa, and for him we have named Neomammnillaria ortegae. 
Mr. J. Francis Macbride and Mr. William Featherstone, who were in charge of the 
botanical expedition of the Field Museum to Peru in 1922 and 1923, made large and valuable 
collections of cacti in central and eastern Peru. 
Mr. E. C. Rost has collected and photographed many interesting cacti for us in 
southern California and Lower California. 
Dr. W. S. W. Kew explored extensively in Lower California in 1921 and sent not only 
many specimens but numerous habit photographs. 
Mr. James H. Ferriss, while making various excursions through the western United 
States, has sent in many specimens. Among his interesting discoveries was the finding 
of Neomammillaria pottsii in southern Texas. 
Mrs. S. L,. Pattison, an enthusiastic collector in western Texas, has sent many valuable 
specimens, including new species collected by herself or for her by local collectors. 
Mrs. Ruth C. Ross spent considerable time in eastern Arizona in Ig21 and collected 
cacti along the route traversed by Emory in 1847, re-collecting certain species which he 
had discovered at that time. 
Mr. Harry Johnson was located for about a year in Guatemala, during which time he 
sent a number of very interesting cacti, especially species of Eptphyllum. Some of these 
were accompanied by full notes and drawings. 
Sefior P. Campos-Porto has sent a number of inter 
ing to the genus Rhipsalis. 
The following persons have contributed valuable specimens, usually from about their 
homes or while engaged in other work: G. W. Goldsmith, Colorado; B. C. Tharp, Texas; 
Charles O. Chambers, Oklahoma; James S. Holmes, Washington, D. C.; Joseph A. Holmes, 
Wyoming; William Hertrich, California; William Tell, Texas; Albert Ruth, Texas; D. C. 
Parman, Texas; Karl Reiche, Mexico; Gerold Stahel, Surinam; Rev. Louis Mille Ecuador; 
H. M. Pilkington, Haiti; Percy L. Ports, Washington, D. C.; W. E. Broadway, Trinidad; 
A. F. Moeller, Mexico; W. E. Meyer, Bolivia; Stephen E. Aguirre, Mexico; Mrs. Elsie 
McElroy Slater, Texas; Paul C. Standley, Central America ; R. D. Camp, Brownsville, 
Texas; George L. F isher, Texas; A. V. Frié, Mexico; and Dana Lee Wyoming. 
As treated in this monograph the Cactus family is composed of 3 tribes. The first 
and second tribes are taken as units, but the third isc i 
! ’ omposed of 8 subtribes. The number 
of genera recognized is 124 and the number of species is 1,235. 
esting specimens from Brazil belong- 
