Xanthium strumarium var. glabratum (DC.) Cronquist

HERBARIUM OF THE UNIVERSITY OF MICHIGAN
Photoperiodic Responses of Races of Xanthium strumarium
Xanthium strumarium L., complex
Grown in greenhouses of the University of Michigan Botanical Gardens,
Dixboro, Washtenaw County, Michigan.
Specimen prepared 26 Oct • , 196^- by W. E. Alexander and B. G. Kang
No. if25
Seed originally collected 5 Oct«, 19&3 at Nashville,Tenn«
by A. C. Buck
and assigned seed lot no. §5*»]S
This plant is from the first	generation	derived from the above seed.
57
Photoperiodic responses of this race are reported under strain no.	by
P. M. Ray and W. E. Alexander, Amer. Jour. Bot., Vol. 53, ppi 810 ,	1966.
03200114