Sepals 3(or 5); lateral sepals free or connate, margins entire or serrate; lower sepal large, petaloid, usually navicular, funnelform, saccate, or cornute, tapering or abruptly constricted into a nectariferous spur broadly or narrowly filiform, straight, curved, incurved, or ± coiled, swollen at tip, or pointed, rarely 2-lobed, rarely without spur. Petals 5, free, upper petal flat or cucullate, small or large, often crested abaxially, lateral petals free or united in pairs. Stamens 5, alternating with petals, connate or nearly so into a ring surrounding ovary and stigma, falling off in one piece before stigma ripens; filaments short, flat with a scalelike appendage inside; anthers 2-celled, connivent, opening by a slit or pore.

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Stamens 5; anthers erect, free or connivent or connate, connectives often dilated into membranous appendages; filaments very short or absent, anterior 2 stamens with spurlike nectary at base.

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Filaments short, distinct; anthers dorsally hairy, connivent, adnate to stigma head; apical appendages incurved; pollen tetrads in masses, attached to a common retinaculum.

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Stamens inserted at corolla base; filaments distinct, threadlike, alternate with minute teeth; anthers connivent, adnate to stigma head, appendages membranous; pollen tetrads in solitary masses in each anther cell, pollen carriers erect; retinaculum minute, dilated at base.

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Stamens 4, anterior 2 longer; anthers anterior and posterior connivent in 2 pairs, locules parallel, divergent after dehiscence.

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Stamens inserted high in corolla tube; anthers often connivent or connate around style, dehiscing by apical pores, often later splitting longitudinally.

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Stamens connivent around gynoecium; filaments free, short; anthers 2-celled, with a distinct membranous connective appendage, lower two with a patent gland at base.

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Stamens inserted at apex of corolla tube; filaments short; anthers exserted, sagittate, connivent at middle, adherent to pistil head, cells spurred at base; disc 5-parted.

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Leaves elliptic, obovate, or ovate-lanceolate, sharply and densely serrate; 3 connectives connivent, central connective incurved, nearly as long as lateral connectives; thecae at middle or apical part of connectives

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Fruit dehiscent siliques, linear, terete, 4-angled, or latiseptate, subsessile; valves glabrous or pubescent, smooth or torulose; replum rounded; septum complete; style obsolete or to 1 mm or longer; stigma conical, 2-lobed, lobes connivent, often connate, opposite replum.

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