Xanthium strumarium var. canadense (Mill.) Torr. & A.Gray

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HERBARIUM OF THE UNIVERSITY OF MICHIGAN
Photoperiodic Responses of Races of Xanthium strumarium
Xanthium strumarium L., complex ( gee annotation by DprlS
Grown in greenhouses of the University of Michigan Botanical Gardens, bOVe )
Dixboro, Washtenaw County, Michigan.
Specimen prepared “7Q Qc t • } 196^ by W. E. Alexander and B. G. Kang
No. 7
Seed originally collected 25 Oct., , 1962 at Central State
College, Wilberforce, G-reene Co., Ohio.
by
W.E. Alexander
and assigned seed lot no. 62—11
This plant is from the f 1 v q t
generation derived from the above seed.
Photoperiodic responses of this race are reported under strain no. 1^	by
P. M. Ray and W. E. Alexander, Amer. Jour. Bot., Vol. 53, pji. SlO ,	1966.
03199988