1. Leaf blades coarsely toothed or shallowly lobed, triangular-ovate, all but the upper ones cordate, with main veins ± palmate; phyllaries not keeled.
A. atriplicifolium
1. Leaf blades entire or nearly so, unlobed, elliptic, with several prominent longitudinal veins; phyllaries prominently keeled.
A. plantagineum
All species found in Arnoglossum
Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. September 24, 2020. https://michiganflora.net/genus.aspx?id=Arnoglossum.