Xanthium strumarium var. strumarium

HERBARIUM OF THE UNIVERSITY OF MICHIGAN
Photoperiodic Responses of Races of Xanthium strumarium
Xanthium strumarium L., complex pensylvanicum
Grown in greenhouses of the University of Michigan Botanical Gardens,
Dixboro, Washtenaw County, Michigan.
Specimen prepared 6 Apr • , 19^5 by W. E. Alexander and B. G. Kang
No.
Seed originally collected 19^“	at Hawaii, Koko Head
Crater, 1/4 mi. from sea, 600 ft* above sea level*
by
George Gillett
and assigned seed lot no. 6J*-1
This plant is from the first	generation derived from the above seed.
Photoperiodic responses of this race are reported under strain no. 50	by
P. M. Ray and W. E. Alexander, Amer. Jour. Bot., Vol. 53, p^>.	1966.
03202078