Euphorbia trigona 'Rubra', also known as Eurphobia trigona 'Royal Red', is an attractive succulent with stems and leaves flushed red to magenta. The stems are often greener for a lovely bi-coloured look. The are with 3 to 4 ridges and V-shaped lighter patterns. Spines are arranged in pairs of 2 on the ridges, reddish-brown and up to 5mm long. Leaves grow between the two spines on each ridge.
Source: World of Succulents