Seeds of Bromus commutatus Schrad. and B. secalinus L. frequently occur together as admixtures in agricultural seed. The latter is designated as noxious by seed laws of a number of states while, with one exception, the former is not. Hence the accurate diagnosis of these seeds becomes a matter of considerable importance to analysts and seed control officials. In a recent investigation of the seed characters of weedy and cultivated species of Bromus, lsely, West, and Pohl, (in press) concluded that the seeds of these species, although frequently confused by seed analysts, could usually be distinguished. They emphasized consideration of the length of the lemma and palea as diagnostic characters in determining the identity of these seeds. However, they pointed out that accuracy of identification would be reduced if the seeds were injured or dehulled during processing. The present study reports further data on the distinctions between Bromus secalinus and B. commutatus, and compares the validity of various characters in distinguishing between "problem" seeds.
Proceedings of the Iowa Academy of Science
©1951 Iowa Academy of Science, Inc.
"Seeds of Bromus Secalinus and Commutatus,"
Proceedings of the Iowa Academy of Science, 58(1), 155-163.
Available at: https://scholarworks.uni.edu/pias/vol58/iss1/15