They are annual or perennial herb with erect, ascending or procumbent stems. Leaflets 3, generally denticulados, stipels absent; stipules adnate to the petiole. capitate, spicate or umbellate inflorescences, axillary or pseudo, usually with numerous flowers, pedunculadas, floral bracts usually present and free or connate at an involucre absent bractéolas, small flowers, pedicellate or sessile; commonly tubular or campanulate with 5 equal or subequal teeth calyx, sometimes swollen in fruit; corolla persistent, Marcescent or deciduous, sometimes swollen in fruit, variously colored, purple, pink, white or yellow, free banner or other petals connate basally, wings and keel sometimes connate and usually adnate to the stamens; stamens 10 diadelphous, free Vexilar, with 5 or all filaments dilated apically, anthers uniform; 1-12-ovulated ovary, sessile or stipitate, style short and curved, glabrous, stigma capitate, terminal, tiny. ,, Mostly subterete, indehiscent or opening along the adaxial suture, commonly membranous leaflets oblong fruits 1 or 2 seeds (3), orbicular or compressed, estrofioladas.
Sierra Gorda de Queretaro.