- 1,585 specimens collected from at least 10 countries
- 693 specimens identified from at least 2 countries
- 452 specimens used in 66 works
Progress
Collected From
- United States 1,143
- Mexico 380
- Canada 34
- Guatemala 10
- Costa Rica 5
- Chile 2
- Argentina 1
- Uruguay 1
- Netherlands 1
- Australia 1
Identified From
- United States 625
- Mexico 67
Dates Collected
- 1835 – 1840 2
- 1880 – 1885 35
- 1945 – 1950 13
- 1950 – 1955 126
- 1955 – 1960 1,216
- 1960 – 1965 89
- 1965 – 1970 49
- 1970 – 1975 6
- 1975 – 1980 2
Dates Identified
- 1945 – 1950 1
- 1950 – 1955 3
- 1955 – 1960 65
- 1960 – 1965 4
- 1965 – 1970 21
- 1970 – 1975 10
- 1980 – 1985 45
- 1985 – 1990 7
- 2010 – 2015 1