Are one of the most variable and interesting succulents of all. There are over 1000 spp. in this family. Forms range from quite bizarre to quite ordinary. Flowers on many are extremely showy and can be bright chartreuse, red, yellow, pink or salmon. Most contain a toxic milky white sap that can cause allergic dermatitis or temporary blindness and stinging if it gets in one’s eyes, so wear gloves and handle with care. Full sun or part shade, depending on spp. Drought tolerant. Deer resistant.