The angel trumpets (Acleisanthes longiflora) belongs to Nyctaginaceae (the Four-o-clock family). It is a perennial herb that is native to southwestern North America. This herb grows in deserts, grasslands, shrublands or woodlands, and can reach about 1 m in height. The stems are sprawling, profusely branched. The leaves are grayish green, lanceolate to triangular, with undulate or crispate edges. The trumpet-like, white, tubular flowers bloom from February to November. Their tubes measure 7-17 cm long.