6 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



the same decade Mrs. E. P. Thompson brought to light many botanical 

 novelties in extreme northern Arizona, near Kanab, Utah, and P. F. 

 Mohr collected around Fort Huachuca. 



The 1880's witnessed great botanical activity in many parts of the 

 State. Southern Arizona was intensively explored by those outstand- 

 ing collectors, J. G. Lemmon and wife (1880-82) and C. G. Pringle 

 (1881-84). In 1884 the Lemmons shifted their attention to the north- 

 ern part of the State. H. H. Rusby explored the Clifton region in 

 1881 and collected extensively in Yavapai and Coconino Counties in 

 1883, obtaining the first adequate representation of the flora of the 

 San Francisco Peaks. W. F. Parish collected around Camp Lowell, 

 near Tucson, in the early 1880's. G. R. Vasey made large collections 

 around Tucson and Yuma in 1881. Marcus E. Jones, whose name is 

 indelibly stamped upon the Arizona flora, began collecting in the State 

 in 1884 and continued his activities there at intervals until 1930. 

 Although the northern counties were his chosen field, he also made 

 several collecting trips to the southern mountains. An Army surgeon, 

 E. A. Mearns, made large collections in Yavapai and Coconino 

 Counties in 1888, and, in the early 1890 's, as naturalist of the second 

 United States-Mexican boundary survey, along the southern border. 

 In 1889 F. H. Knowlton made a fruitful exploration of the San Fran- 

 cisco Peaks and E. L. Greene collected less extensively in the same 

 region. 



From 1890 to the present, so many persons have collected plants in 

 Arizona that only a few of those who made large collections may be 

 mentioned here. During the 1890's, outstanding collectors were: 

 A. Davidson in Greenlee County; E. A. Mearns and F. X. Holzner 

 along the Mexican border; Walter Hough in Apache and Navajo 

 Counties (continuing into the next decade); D. T. MacDougal in 

 Coconino, Yavapai, and Gila Counties; G. C. Nealley in the Rincon 

 Mountains; C. A. Purpus in Coconino and Yavapai Counties; J. W. 

 Tourney in many parts of the State; T. E. Wilcox in the Huachuca 

 Mountains; N. C. Wilson in the northern and central counties; 



E. O. Wooton in many parts of the State, at intervals from 1892 to 

 1914; and Myrtle Zuck in Navajo and Pima Counties. 



The work continued actively during the 1900's, in which period 

 extensive collections were made by: J. C. Blumer, chiefly in the Chiri- 

 cahua Mountains; H. D. Burrall and J. S. Holmes, in the same area; 



F. V. Coville, in the White Mountain region; E. A. Goldman, in 

 nearly all parts of the State; David Griffiths, in Pima County, the 

 White Mountains, and elsewhere; J. B. Leiberg on the San Francisco 

 Peaks; G. A. Pearson, in Coconino County; J. J. Thornber, chiefly 

 in Coconino and Pima Counties; Ivar Tidestrom at several localities 

 from the northern to the southern boundary; and L. F. Ward in the 

 Little Colorado River and Grand Canyon regions. 



Among those who collected during the decade 1910-19 the follow- 

 ing may be mentioned: Alice Eastwood, in many parts of the State 

 (continuing at intervals until 1938) ; W. W. Eggleston in eastern Ari- 

 zona (also in the next decade) ; L. N. Goodding, chiefly in the White 

 Mountains and the southern counties (continuing until the present 

 time); J. A. Harris in the Santa Gatalina Mountains; A. S. and A. E. 

 Hitchcock in the Grand Canyon region; Alfred Rehder in many parts 

 of the State; Forrest Shreve chiefly in the Pinal eno and Santa Catalina 



