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1 Fruits silicles (<3× as long as wide). |
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..2 Plant with some cauline leaves. |
....3 Cauline leaves sessile; blade bases auriculate, sagittate, or amplexicaulous. |
......4 Fruits narrowly pyriform to pyriform or broadly obovoid |
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....3 Cauline leaves petiolate or sessile and not auriculate. |
........5 Leaves 2-3× pinnately dissected |
........5 Leaves not pinnately dissected. |
..........6 Fruits with 1-2 seeds |
............ 7 Plants canescent (grayish-green pubescent) throughout; plants herbaceous |
............ 7 Plants green, not canescent throughout (sometimes sparsely pubescent, especially distally, but not uniformly canescent); larger plants often suffruticose |
..........6 Fruits with 4 or more seeds. |
............ ..8 Seeds winged or margined |
............ ..8 Seeds without differentiated margin |
............ ....9 Plants with basal leaves strongly rosulate |
............ ....9 Plants without strong basal leaf rosette, instead leaves cauline |
1 Fruits siliques (> 3× as long as wide). |
............ ......10 Leaves basal only |
............ ......10 Plant with some cauline leaves. |
............ ........11 Cauline leaves sessile; blade bases auriculate, sagittate, or amplexicaule. |
............ ..........12 Seeds biseriate |
............ ..........12 Seeds uniseriate. |
............ ............ 13 Siliques straight, slightly ascending to strictly erect or appressed; seeds 0.6-1.7 mm long; basal leaves < 8 cm long |
............ ............ 13 Siliques curved or straight, ascending to descending, seeds either <1mm long or < 2.5 mm long, basal leaves 2.5-20 cm long |
............ ........11 Cauline leaves petiolate or sessile and not auriculate. |
............ ............ ..14 Trichomes sessile, medifixed |
............ ............ ..14 Trichomes not sessile and medifixed. |
............ ............ ....15 Leaves 2-3× pinnately dissected |
............ ............ ....15 Leaves not 2-3× pinnately dissected.. |
............ ............ ......16 Stigmas 2-lobed with lobes connivent and decurrent to erect |
............ ............ ......16 Stigmas entire and capitate, rarely slightly 2-lobed. |
............ ............ ........17 Seeds unseriate |
............ ............ ........17 Seeds biseriate. |