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1 |
..2 Flowers yellow. |
....3 Trichomes sessile, medifixed; [tribe Erysimeae] |
....3 Trichomes not sessile and medifixed. |
......4 Leaves 2-3× pinnately dissected; [tribe Descurainieae] |
......4 Leaves not pinnately dissected. |
........5 Cauline leaves not auricled; [tribe Alysseae] |
........5 Cauline leaves auricled; [tribe Camelineae]. |
..........6 Annual; petals yellow to pale yellow, fading whitish |
..........6 Perennial or biennial; petals creamy or pale yellow |
..2 Flowers white, pinkish, lavender, or blue. |
............ 7 Leaves only basal; [tribe Arabideae] |
............ 7 Leaves cauline (and often basal as well). |
............ ..8 Ovaries and young fruits not linear. |
............ ....9 Cauline leaves sessile and auriculate; [tribe Camelineae]. |
............ ......10 Petals pale yellow, fading to whitish |
............ ......10 Petals wholly white |
............ ....9 Cauline leaves petiolate or sessile and not auriculate. |
............ ........11 Petal apices strongly bifid; [tribe Alysseae] |
............ ........11 Petal apices rounded, retuse, or emarginate. |
............ ..........12 Leaves 2-3× pinnately dissected; [tribe Descurainieae] |
............ ..........12 Leaves not pinnately dissected. |
............ ............ 13 Ovules 1-2 per ovary; [tribe Alysseae] |
............ ............ 13 Ovules 4 or more per ovary; [tribe Arabideae] |
............ ..8 Ovaries and young fruits linear. |
............ ............ ..14 Cauline leaves sessile and auriculate. |
............ ............ ....15 Young fruits ascending to descending; [tribe Boechereae] |
............ ............ ....15 Young fruits ascending to erect or appressed to rachis. |
............ ............ ......16 Stems pubescent or less commonly glabrous above, not glaucous; [tribe Arabideae] |
............ ............ ......16 Stems glabrous and glaucous above; [tribe Camelineae] |
............ ............ ..14 Cauline leaves usually petiolate and if sessile, not auriculate. |
............ ............ ........17 Stigmas 2-lobed, petals > 15 mm long; [tribe Hesperideae] |
............ ............ ........17 Stigmas entire, petals < 6 mm long. |
............ ............ ..........18 Leaves pinnately divided or lobed. |
............ ............ ............ 19 Leaves lyrate pinnatifid; [tribe Camelineae] |
............ ............ ............ 19 Leaves 2-3× pinnately dissected; [tribe Descurainieae] |
............ ............ ..........18 Leaves entire or toothed. |
............ ............ ............ ..20 Sepals 1-2.5 mm; of disturbed habitats; seeds uniseriate; [tribe Camelineae] |
............ ............ ............ ..20 Sepals 0.7-1.2 mm or >2.5 mm; of disturbed and natural habitats; seeds biseriate; [tribe Arabideae] |
1 Fruits silicles (<3× as long as wide). |
..2 Leaves basal only |
..2 Plant with some cauline leaves. |
....3 Cauline leaves sessile; blade bases auriculate, sagittate, or amplexicaule. |
......4 Fruits obdeltoid |
......4 Fruits narrowly pyriform to pyriform or broadly obovoid |
....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 |
..........6 Fruits with 4 or more seeds. |
............ 7 Seeds winged or margined |
............ 7 Seeds without differentiated margin |
1 Fruits siliques (> 3× as long as wide). |
............ ..8 Leaves basal only |
............ ..8 Plant with some cauline leaves. |
............ ....9 Cauline leaves sessile; blade bases auriculate, sagittate, or amplexicaule. |
............ ......10 Seeds biseriate |
............ ......10 Seeds uniseriate. |
............ ........11 Siliques straight, slightly ascending to strictly erect or appressed; seeds 0.6-1.7 mm long; basal leaves < 8 cm long |
............ ........11 Siliques curved or straight, ascending to descending, seeds either <1mm long or < 2.5 mm long, basal leaves 2.5-20 cm long |
............ ....9 Cauline leaves petiolate or sessile and not auriculate. |
............ ..........12 Trichomes sessile, medafixed |
............ ..........12 Trichomes not sessile and medafixed. |
............ ............ 13 Leaves 2-3× pinnately dissected |
............ ............ 13 Leaves not 2-3× pinnately dissected.. |
............ ............ ..14 Stigmas 2-lobed with lobes connivent and decurrent to erect |
............ ............ ..14 Stigmas entire and capitate, rarely slightly 2-lobed. |
............ ............ ....15 Seeds biseriate. |
............ ............ ....15 Seeds unseriate |