Genus of 1 or 2 species of evergreen shrubs or small trees found in seasonally dry stream beds and margins from the Mediterranean to China. Oleander needs a large room or conservatory. It is a large tree or shrub. The fragrant blooms appear in summer. In autumn cut back the stems. White, pink, red and yellow varieties are available. All parts are highly toxic if ingested. Contact with foliage may irritate skin.