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1,100,502 specimens across 6 departments, collected since 1754 — 100,256 names, 42,336 type specimens.
Ambrosia psilostachya
BISH 11500 · Warneck, B.H., 1944
Travis County, about Austin
Ambrosia psilostachya
BISH 374898 · Stone, B.C., 1968
San Diego County: U.S.Highway 80, near Guatay
Ambrosia psilostachya
BISH 614992 · Vickery Jr., R.K., 1957
Salt Lake County; mouth of Red Butte Canyon
Ambrosia psilostachya
BISH 615951 · Cottam, W.P., 1938
Westside; railroad tracks