- 4,932 specimens collected from at least 3 countries
- 6 specimens identified from at least 1 country
- 331 specimens used in 67 works
Progress
Collected From
- United States 4,913
- United Kingdom 1
- Ireland 1
Identified From
Dates Collected
- 1875 – 1880 1
- 1890 – 1895 1
- 1895 – 1900 1
- 1900 – 1905 2
- 1905 – 1910 16
- 1910 – 1915 639
- 1915 – 1920 274
- 1920 – 1925 447
- 1925 – 1930 378
- 1930 – 1935 209
- 1935 – 1940 591
- 1940 – 1945 327
- 1945 – 1950 764
- 1950 – 1955 308
- 1955 – 1960 458
- 1960 – 1965 261
- 1965 – 1970 75
- 1970 – 1975 5
- 1975 – 1980 2