Xanthium strumarium var. glabratum (DC.) Cronquist

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HERBARIUM OF THE UNIVERSITY OF MICHIGAN
Photoperiodic Responses of Races of Xanthium strumarium
Xanthium strumarium L., complex ( S e 6 afinO t° t ion by DoriS
Love)
Grown in greenhouses of the University of Michigan Botanical Gardens,
Dixboro, Washtenaw County, Michigan.
Specimen prepared 4- Oct., 1963 by W. E. Alexander and B. G. Kang
No. ij-2
at Sessions Landing
NEW YORK BOTANICAL GARDEN
"63200061
Seed originally collected Fall l96l
Mies. (Bolivar Go.)
by
Robert Farmer
and assigned seed lot no.
61-9
This plant is from the S e COnd generation derived from the above seed.
Photoperiodic responses of this race are reported under strain no. 6	by
P. M. Ray and W. E. Alexander, Amer. Jour. Bot., Vol. 53, p/. 2>10 ,	1966.
03200061