Thryallis is a compact, upright rounded, evergreen shrub. It is covered year-round with small yellow flowers. The Thryallis does best in full sun and grows to be 3- 6 feet. It is low-maintenance but may require occasional pruning to maintain its shape. This plant is attractive to bees, butterflies and birds, but it is unappealing to deer. Thryallis tolerates dry conditions and should be planted in well-drained soil.