Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
1 Siliques 4-7 mm long; leaves and stem rough-hairy, with all simple trichomes or with a mixture, and then the stellate trichomes exceeded by the simple trichomes (which are 1-2 mm long).
..2 Petals pale yellow, (2.5-) 3-4 (-6) mm long; leaves and stem with a mixture of simple and stellate trichomes, the simple trichomes 1-2 mm long, exceeding the stellate trichomes