Key to Wisconsin Alopercurus

Authors: Robert W. Freckmann, John G. Zaborsky, Emmet J. Judziewicz

• 1a. 1. Spikelets 4–6 mm long (excluding awns), the awns exserted 4–6 mm beyond the glume tips A. pratensis

• 1b. 1. Spikelets 2–3.5 mm long (excluding awns), the awns exserted 0–3 mm beyond the glume tips 2

• 2a. Awns usually included in the spikelets or exserted no more than 1 mm beyond the glume tips and inserted near the middle of the back of the lemma A. aequalis

• 2b. Awns exserted 2–3 mm beyond the glume tips, the awns inserted near the base of the lemma 3

• 3a. Anthers 0.3–1 mm long; lemmas 1.9–2.7 mm long; annuals A. carolinianus

• 3b. Anthers 1.4–2.0 mm long; lemmas 2.5–3 mm long; perennials A. geniculatus