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

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NEW YORK BOTANICAL GARDEN
03199963
HERBARIUM OF THE UNIVERSITY OF MICHIGAN
Photoperiodic Responses of Races of Xanthium strumarium
Xanthium strumarium L., complex (see annotation bv Doris
................................................. Love)
Grown in greenhouses of the University of Michigan Botanical Gardens,
Dixboro, Washtenaw County, Michigan.
Specimen prepared 21 Sept., 196 ^by W. E. Alexander and B. G. Kang
No. 6k
Seed originally collected Nov. , 196l at Ann Arbor,
Washtenaw Co., Mich. Hampstead Lane
by Robert Lav/ry
and assigned seed lot no.	BGr5
This plant is from the Se COnd generation derived from the above seed.
Photoperiodic responses of this race are reported under strain no. ^ 0	by
P. M. Ray and W. E. Alexander, Amer. Jour. Bot., Vol. S3, vp. g-j^Q	1966.
03199963