Galphimia gracilis

Galphimia gracilis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Malpighiales
Family:	Malpighiaceae
Genus:	Galphimia
Species:	G. gracilis
Binomial name
Galphimia gracilis Bartl.

Flowers in Hyderabad, India.

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. In horticultural publications, in the nursery trade, and on websites, this species is commonly but mistakenly referred to as Galphimia glauca, Galphimia brasiliensis, Thryallis glauca, Thryallis gracilis, or often in South America, Thryallis brasiliensis.

Galphimia gracilis is easily told apart from the true 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 8–14 mm long and 4–8 mm wide; in G. brasiliensis only 2 or 3 small flowers are open at one time on a sparse inflorescence, and the petals are only 4–5 mm long and ca. 3 mm wide. Pollens are spherical, approximately 16-18 microns in diameter.

Pollens of Galphimia gracilis

Pollen of Galphimia gracilis

External links and reference

• Malpighiaceae Malpighiaceae - description, taxonomy, phylogeny, and nomenclature
• Galphimia
• Thryallis
• Anderson, C. 2007. Revision of Galphimia (Malpighiaceae). Contributions from the University of Michigan Herbarium 25: 1–82.