Upright, evergreen shrub topped by chartreuse terminal cymes with purple centers.  Flower stalks die back after bloom, with new stalks emerging for the next year.  Blooms May-July.  Grow in full sun, in light, well drained soil, with low water.   Grows up to 36” tall.   Definitely a reseeder in our garden but seedlings are easy to pull. From the W. Mediterranean.   Zones 7-10.   Euphorbiaceae