Euphorbia bongolavensis

Native to northwestern Madagascar, this small, semi-succulent shrub grows in dry, rocky habitats and develops an umbrella-like crown above an upright stem. Short, densely packed shoots carry clusters of lance-shaped leaves with reddish bases and green to bluish-green tips. The stem has peeling bark, and tiny yellow flowers gather in specialized cup-like clusters called cyathia. Slow-growing and often cultivated as a container ornamental, the plant can reach about three feet tall. The milky sap can irritate skin and eyes, and the plant is harmful if eaten. Photographed in Florida.