Euphorbia fulgens, the scarlet plume, is a species of flowering plant in the spurge family Euphorbiaceae, native to Mexico. Growing to tall by broad, it is a deciduous shrub with long, weeping branches and narrow leaves. In winter orange-red flowers growing in the leaf axils cover the length of the branches.
The Latin specific epithet fulgens means "shining, glistening".
It is not hardy, requiring temperatures above . It must therefore be grown under glass in temperate regions. It has gained the Royal Horticultural Society's Award of Garden Merit.