We follow O’Kane & Al-Shehbaz (1997) in placing Arabis lyrata into Arabidopsis; indeed, our two species look similar and are sometimes confused. See Koch et al. (2008) for more information.

1. Petals (4-) 5-8 (-9) mm long, seeds ca. 1 mm long.

A. lyrata

1. Petals 2-4.2 mm long, seeds ca. 0.3-0.5 mm.

A. thaliana