- 12,908 specimens collected from at least 6 countries
- 399 specimens identified from at least 4 countries
- 426 specimens used in 59 works
Progress
Collected From
- United States 12,557
- Canada 28
- Puerto Rico 3
- Iceland 3
- Australia 1
- Colombia 1
Identified From
- United States 325
- Brazil 55
- Canada 7
- Russian Federation 1
Dates Collected
- 1860 – 1865 5
- 1865 – 1870 1
- 1870 – 1875 1
- 1885 – 1890 1
- 1910 – 1915 1
- 1915 – 1920 1
- 1930 – 1935 2
- 1935 – 1940 113
- 1940 – 1945 22
- 1945 – 1950 321
- 1950 – 1955 1,664
- 1955 – 1960 1,602
- 1960 – 1965 1,798
- 1965 – 1970 3,056
- 1970 – 1975 2,646
- 1975 – 1980 682
- 1980 – 1985 1
- 1985 – 1990 3
- 1995 – 2000 1
- 2000 – 2005 1
- 2005 – 2010 1
Dates Identified
- 1930 – 1935 1
- 1935 – 1940 1
- 1940 – 1945 1
- 1945 – 1950 22
- 1950 – 1955 32
- 1955 – 1960 11
- 1960 – 1965 18
- 1965 – 1970 58
- 1970 – 1975 37
- 1975 – 1980 4
- 1990 – 1995 1