Varronia bullata subsp. humilis, commonly known as the Curlytop Ironwood, is a deciduous shrub native to the tropical dry forests of Mexico, Central and South America, and the Caribbean. It typically grows to a height of 3-6 feet (1-2 meters) with a similar spread, and is characterized by its dense, rounded form. The leaves are small, green, and have a distinctive curled appearance that gives the plant its common name. While flowering and fruiting information is not widely documented, the plant is presumed to have inconspicuous flowers and may produce small fruits that are significant to local wildlife.

Curlytop Ironwood is valued for its drought tolerance and ability to thrive in poor soils, making it suitable for xeriscaping and low-maintenance gardens. It is used for ornamental purposes, particularly in rock gardens and as a component of dry, tropical-themed landscapes. This shrub prefers full sun exposure and requires minimal water once established, reflecting its adaptation to dry forest conditions. It is important to provide well-draining soil to prevent root rot. There are no widely known cultivars or significant disease problems associated with this species, but gardeners should be aware of its potential to spread if conditions are favorable.CC BY-SA 4.0