Sebaea grisebachiana Schinz

Slender erect annual herbs 5-15 cm high, simple or branched from the base. Leaves 3-12 mm long, 2-10 mm broad, ovate-elliptic to broadly ovate or cordate, acute or subacute, thin, scattered along the stems or the lower ones crowded into a small rosette. Inflorescence a lax, few-flowered cyme or a small corymb; bracts very small, ovate-lanceolate to subulate. Calyx of 5 segments, each 3.5-6.5 mm long, 0.75-1.75 mm broad, lanceolate to elliptic, acuminate, sometimes mucronate, the sides hyaline, free or joined for up to 0.5 mm, with a keel-wing up to 1 mm broad, broadest at or near the base, wing sometimes strongly veined, its margin sometimes papillose-scabrid. Corolla yellow; tube 2.5-5.5 mm long; lobes 3-5.75 mm long, 1.25-3.25 mm broad, narrowly elliptic to obovate or obovate-orbicular, obtuse. Filaments 0.3-1 mm long, inserted in the corolla-sinuses; anthers 1-2.75 mm long, without glands or with minute apical glands. Style and stigma 3.25-5.5 mm long, with a medium to large stigmatic swelling near the base or below the middle; stigma clavate, 2-lobed with tongue-shaped lobes, 0.75-2.5 mm long.