United States, Arkansas, Washington, Grown in the departmental greenhouse in Fayetteville.
This is an artificial F2 hybrid of the "Cal." race X the "Ariz." race. The plant was open pollinated. See note for additional details. This is F2 plant no. 1 of the following cross: ["Cal" RSABG X "Ariz." 3596] - 1 X ["Call" RSABG X "Ariz." 3595] - 3. Original maternal parent was the "Cal" race. Achene wings 0.7-0.8 mm wide, length 3.4-3.7 mm, diameter including wings 2.4-2.6 mm, body width 1.2-1.4 mm; glands not evident, present more or less in a single row at each edge of body but essentially colorless!