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 Pedicels of fruits definitely deflexed; pedicels of flowers spreading (spreading or very slightly ascending in first few mm, then down-curved). |
1 Pedicels of fruits erect or ascending; pedicels of flowers erect, ascending, spreading, or arching. |
..2 Mature fruits < 4 cm long; stems branched or simple at the base. |
....3 Stem leaves (most of them) < 5 mm wide; stems branched at the base |
....3 Stem leaves (most of them) > 8 mm wide; stems simple at the base. |
......4 Lower cauline leaves glabrous or sparsely pubescent on the upper surface; fruits erect and appressed, 3-5 cm long |
......4 Lower cauline leaves hirsute or strigose on the upper surface; fruits widely ascending or spreading. 1.5-4 cm long. |
........5 Petals 6-9 mm long; fruiting pedicels 10-16 mm long; mature fruits 2.5-4 cm long; pubescence of the lower leaf surface simple; seeds winged |
........5 Petals 2-5 mm long; fruiting pedicels 2-10 (-13) mm long; mature fruits 1.5-3 cm long; pubescence of the leaf surface stellate; seeds wingless. |
..........6 Petals 2-3 mm long, white to cream; fruiting pedicels 2-3.5 mm long; siliques 1.5-3 cm long; pubescence of the upper leaf surface simple |
..........6 Petals 3-5 mm long, pink or purplish; fruiting pedicels 5-10 (-13) mm long; siliques 1.5-2 cm long; pubescence of the upper leaf surface stellate |
..2 Mature fruits > 4 cm long; stems generally simple at the base. |
............ 7 Fruits erect, appressed against the stem, the fruiting inflorescence < 2 cm in diameter. |
............ ..8 Mature fruits terete, (4-) 7-9.5 cm long; basal leaves 5-12 cm long, stellate pubescent; cauline leaves 4-12 cm long; pubescence of the stem mostly of spreading, simple hairs |
............ ..8 Mature fruits flat, 1.5-10 cm long; basal leaves 2-8 cm long, nearly glabrous; cauline leaves 1-4 cm long; pubescence of the stem mostly of appressed, forked hairs. |
............ ....9 Mature fruits 4-10 cm long, 1.5-2.5 mm wide, with 2 rows of seeds in each locule |
............ ....9 Mature fruits 1.5-7 cm long, 0.7-1.1 mm wide, with 1 row of seeds in each locule |
............ 7 Fruits ascending to spreading (not erect and appressed to the stem), the fruiting inflorescence > 4 cm in diameter. |
............ ......10 Cauline leaves not at all auricled or sagittate-clasping at the base. |
............ ........11 Calyx 2.9-4.8 mm long; flowering Apr-May; plant unbranched or with 1-3 branches (sometimes more if the main stem damaged), the inflorescence thus a raceme or slightly paniculate; mature fruits 5.2-9.8 cm long; seeds 64-80 per silique; seeds with wing 0.2-0.5 mm wide |
............ ........11 Calyx 2.0-3.3 mm long; flowering mid Jul-Sep; plant with numerous branches (well-developed plants usually with at least 10), the inflorescence thus a diffuse panicle; mature fruits 4.3-8.0 cm long; seeds 30-42 per silique; seeds with wing 0.1-0.2 mm wide |
............ ......10 Cauline leaves auricled or sagittate-clasping at the base. |
............ ..........12 Basal leaves subentire to serrate or sinuate-serrate; petals white, to 5 mm long, equaling or slightly surpassing the sepals; longest cauline leaves usually 8-18 cm long; plant glaucous |
............ ..........12 Basal leaves sharply serrate-dentate to strongly laciniate or lyrate-pinnatifid; petals creamy-white, to 8 mm long, about 2× the length of the sepals; longest cauline leaves usually 3-5 cm long; plant green or red-tinged |
|
..2 Trichomes sessile, medifixed; [tribe Erysimeae] |
..2 Trichomes not sessile and medifixed. |
....3 Leaves 2-3× pinnately dissected; [tribe Descurainieae] |
....3 Leaves not pinnately dissected. |
......4 Cauline leaves not auricled; [tribe Alysseae] |
......4 Cauline leaves auricled; [tribe Camelineae]. |
........5 Annual; petals yellow to pale yellow, fading whitish |
........5 Perennial or biennial; petals creamy or pale yellow |
1 Flowers white, pinkish, lavender, or blue. |
..........6 Leaves only basal; [tribe Arabideae] |
..........6 Leaves cauline (and often basal as well). |
............ 7 Ovaries and young fruits not linear (instead pyriform, obovoid, obdeltoid, depressed globose, elliptic or otherwise not strictly linear throughout). |
............ ..8 Cauline leaves sessile and auriculate; [tribe Camelineae]. |
............ ....9 Petals pale yellow, fading to whitish |
............ ....9 Petals wholly white |
............ ..8 Cauline leaves petiolate or sessile and not auriculate. |
............ ......10 Petal apices strongly bifid; [tribe Alysseae] |
............ ......10 Petal apices rounded, retuse, or emarginate. |
............ ........11 Leaves 2-3× pinnately dissected; [tribe Descurainieae] |
............ ........11 Leaves not pinnately dissected. |
............ ..........12 Ovules 1-2 per ovary; plants usually canescent (bearing a fine grayish-white pubescence); [tribe Alysseae] |
............ ..........12 Ovules 4 or more per ovary (2-10 in Lobularia); plants green, not obviously canescent (or only slightly in Lobularia). |
............ ............ 13 Plants not scapose or with rosulate basal leaves, leaves cauline and usually abundant throught the stems; larger plants often suffruticose; [tribe Malcolmieae] |
............ ............ 13 Plants scapose, thus without cauline leaves ( D. verna) OR strongly rosulate with well-spaced cauline leaves; plants herbaceous (D. ramosissima); [tribe Arabideae] |
............ 7 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 Plant with some cauline leaves. |
....3 Cauline leaves sessile; blade bases auriculate, sagittate, or amplexicaulous. |
......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 |
............ 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, medafixed |
............ ............ ..14 Trichomes not sessile and medafixed. |
............ ............ ....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. |