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

tr*
CD ?
w, tr
H CD
2 <+
pr
pr tr
VO CD
H» ÍT
HERBARIUM OF THE UNIVERSITY OF MICHIGAN
Photoperiodic Responses of Races of Xanthium strumarium
Xanthium stramaiinm L.t complex (see annotation by Doris
L o vs)
Grown in greenhouses of the University of Michigan Botanical Gardens,
Dixboro, Washtenaw County, Michigan.
Specimen prepared	Oct	196*^y W* E' Alexander and B- G. Kang
Seed originally collected ty- Aug. , 19^2 at LI all O , Tex. ,
8 mi. south of
Calvin McMillan
NEW YORK BOTANICAL GARDEN
03199953
and assigned seed lot no.
This plant is from the	f iT 8t	generation derived from the above seed.
Photoperiodic responses of this race are reported under strain no.	by
P. M. Ray and W. E. Alexander, Amer. Jour. Bot., Vol. 53, gp. 810,	1966.
03199953