- 4,955 specimens collected from at least 3 countries
- 6 specimens identified from at least 1 country
- 293 specimens used in 51 works
Progress
Collected From
- United States 4,934
- United Kingdom 1
- Ireland 1
Identified From
Dates Collected
- 1875 – 1880 1
- 1890 – 1895 1
- 1900 – 1905 1
- 1905 – 1910 16
- 1910 – 1915 554
- 1915 – 1920 268
- 1920 – 1925 445
- 1925 – 1930 374
- 1930 – 1935 210
- 1935 – 1940 591
- 1940 – 1945 328
- 1945 – 1950 766
- 1950 – 1955 313
- 1955 – 1960 458
- 1960 – 1965 259
- 1965 – 1970 75
- 1970 – 1975 3
- 1975 – 1980 2