Galphimia gracilis, a species in the genus Galphimia of the family Malpighiaceae, is native to eastern Mexico. It is widely cultivated in warm regions throughout the world, often under the common names gold shower or shower-of-gold, slender goldshower or sometimes thryallis.
Galphimia gracilis is easily told apart from G. glauca and G. brasiliensis by the flowers. In G. gracilis, the petals fall as the fruit matures; in G. glauca the petals are persistent even in fruit.
In G. gracilis, many flowers of a dense inflorescence are open at one time, and the petals (claw and limb) are 8–14mm (0.31–0.55in) long and 4–8mm (0.16–0.31in) wide; in G. brasiliensis only two or three small flowers are open at one time on a sparse inflorescence, and the petals are only 4–5mm (0.16–0.20in) long and ca. 3mm (0.12in) wide. Pollen grains are spherical, approximately 16-18 microns in diameter.
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