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

Xanthium strumarium l., complex (see annotation by Doris Dove)
Grown in greenhouses of the University of Michigan Botanical Gardens,
Dixboro, Washtenaw County, Michigan.
Specimen prepared n Qct. , 19Ó3
No. 5U
by W. E. Alexander and B. G. Kang
NEW YORK BOTANICAL GARDEN
03199979
Seed originally collected fall, 1962
Exper. Sta. West in Redwood Go.
John J.
Ruensmele
and assigned seed lot no.
This plant is from the first
at Lambert on, Minn.,
generation derived from the above seed.
Photoperiodic responses of this race are reported under strain no. y2	by
P. M. Ray and W. E. Alexander, Amer. Jour. Bot., Vol. 53, ygi. 8l0,	1966.
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