- 1,276 specimens collected from at least 2 countries
- 18 specimens identified from at least 5 countries
- 178 specimens used in 35 works
Progress
Collected From
- United States 1,271
- Canada 4
Identified From
- Peru 9
- United Kingdom 3
- United States 2
- Canada 2
- Ireland 2
Dates Collected
- 1885 – 1890 1
- 1895 – 1900 1
- 1900 – 1905 5
- 1905 – 1910 1
- 1910 – 1915 7
- 1915 – 1920 80
- 1920 – 1925 337
- 1925 – 1930 249
- 1930 – 1935 346
- 1935 – 1940 107
- 1940 – 1945 47
- 1945 – 1950 12
- 1955 – 1960 1
- 1970 – 1975 2
- 1990 – 1995 1