Galphimia, particularly Galphimia glauca (also known as Thryallis or Shower of Gold), is a Neotropical evergreen shrub in the Malpighiaceae family, native to Mexico and Central America, renowned for its bright yellow flowers that bloom throughout the year. 

Here's a more detailed description:

General Characteristics:

Plant Type: Evergreen shrub.

Native Region: Mexico and Central America.

Family: Malpighiaceae.

Common Names: Thryallis, Shower of Gold, Rain of Gold.

Growth Habit: Compact, upright, rounded.

Height: Can grow up to 6 feet tall.

Spread: Can spread 4 to 6 feet.

Flowers: Bright yellow, small, and showy, blooming throughout the year.

Foliage: Lush green leaves that may become bronze-colored during cold conditions.

Uses: Commonly used in landscaping for its ornamental value.

Hardiness Zones: Thrives in USDA hardiness zones 9B through 11. 

Distinguishing Features:

• Galphimia glauca is known for its petals remaining on the plant even as the fruit matures, which helps distinguish it from other species like Galphimia gracilis where the petals fall off. 
• The plant is also known for attracting pollinators like bees and butterflies. 
• The genus Galphimia comprises 26 species of large herbs, shrubs, and treelets, mostly occurring in Mexico. 
• The genus name is an anagram of Malpighia.