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

NEW YORK BOTANICAL GARDEN
03199964
Xanthium strumarium l., complex (Bee annotation by Doris L6ve)
Grown in greenhouses of the University of Michigan Botanical Gardens,
Dixboro, Washtenaw County, Michigan.
Specimen prepared JQ Qct • , 1963 by W. E. Alexander and B. G. Kang
Seed originally collected 21 Sept., 1962 at San Juan del Rio,
Queretaro, Mex.
by William S. Payne ^3861
and assigned seed lot no. y # Payne tr3861
This plant is from the first	generation	derived	from	the	above	seed.
Photoperiodic responses of this race are reported under strain no.	by
P. M. Ray and W. E. Alexander, Amer. Jour. Bot., Vol. 53, p^ 810 ,	1966»
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