The two grasses, Alopecurus carolinianus and Poa chapmaniana, shown in accompanying figure, are sometimes troublesome weeds focally in the early part of the season. In the Herbaceous Garden at Iowa State College these two grasses are difficult to control through May and the forepart of June. They are remarkably similar in size and habits of growth. Both are annuals and range in height from a few inches to a foot. Both are densely tufted, form thick stands, and have practically the same period of growth, both starting growth soon after the ground thaws in the spring, and seeding and disappearing the forepart of June. In the Herbaceous Garden they commonly intermingle.
Proceedings of the Iowa Academy of Science
©1944 Iowa Academy of Science, Inc.
Martin, J. N.
"The Habits of Two Weedy Grasses, Alopecurus carolinianus Walt. and POA chapmaniana Scribn.,"
Proceedings of the Iowa Academy of Science, 51(1), 225-228.
Available at: https://scholarworks.uni.edu/pias/vol51/iss1/19