- 1,145 specimens collected from at least 2 countries
- 13 specimens identified from at least 3 countries
- 154 specimens used in 24 works
Progress
Collected From
- United States 1,140
- Canada 4
Identified From
- Peru 9
- United States 2
- Canada 2
Dates Collected
- 1885 – 1890 1
- 1895 – 1900 1
- 1900 – 1905 5
- 1910 – 1915 6
- 1915 – 1920 76
- 1920 – 1925 275
- 1925 – 1930 204
- 1930 – 1935 336
- 1935 – 1940 106
- 1940 – 1945 44
- 1945 – 1950 12
- 1955 – 1960 4
- 1970 – 1975 2
- 1990 – 1995 1