116
The collection history of B. tectorum in the Intermountain West of NA is well
documented (Mack 1981 ). The grass was fi rst collected at Spences Bridge, British
Columbia, in 1889; Ritzville, Washington, in 1893; Provo, Utah, in 1894; Pullman,
Washington, in 1897, Eastern Colorado in 1897, Boise, Idaho, in 1899, and the
Klamath Valley of Oregon in 1902. Similar to the introduction of B. tectorum in the
Fig. 4.6 Multilocus genotypes for 40 populations of Bromus tectorum in the Western USA. Pie
diagrams illustrate the proportions of each multilocus genotype in each population. (See caption
for Fig. 4.2 for further explanation of the pie diagrams.) Numbers are the population designations
from Novak et al. ( 1991 )
S.J. Novak and R.N. Mack