Galphimia glauca aka Goldshower

Galphimia glauca is a small shrub. It comes from Mexico and Central America. It is part of the Malpighiaceae plant family. People call it thryallis or gold shower thryallis. The Royal Horticultural Society says it is not native to Britain or Ireland. Its record leaves the name's status unresolved, or not settled. Chicago Botanic Garden uses the name Galphimia glauca. Its account covers use outdoors and as a show plant in a conservatory, a glass growing house.

The shrub grows upright and has a fine texture. These traits make it suited to hedges in the tropics. Chicago also lists it for screens and as a stand-alone show plant. The sources give no height or width at full growth. They call it small but give no measured garden size. They give no facts about the bark or stems. The leaves appear in the account of folk use in Mexico.

Small spikes of yellow flowers give the shrub its main show. Chicago notes that it keeps blooming in a glass growing house. Its bloom chart spans all months, from January through December. This points to a long show in the conditions that source describes. The account gives no distinct bloom season for plants grown outdoors. It gives no details of the fruit or seeds. The sources name no creature that helps flowers set seed. They do not say how the plant's flowers receive pollen.

Chicago lists full sun and part shade as suitable for growth. It gives USDA hardiness zones 9–11. It lists a moderate need for water. The account says the shrub can cope with drought in the tropics. It also says the plant grows well in sandy soil. These facts support its garden use and worth in warm regions. The sources give no soil pH range or UK hardiness rating. They do not state pruning needs or name pests or diseases.

In Mexico, people use the leaves in folk remedies. They use them for asthma and allergies. This shows folk use, not proof that the treatment works. Neither source gives a medical safety review or tells how to use it. The sources do not name any plant part as safe to eat. They give no finding on whether it is toxic to people or pets. The stated garden uses are hedges, screens, and stand-alone show plants. Yellow flowers form the main feature in these roles.