Euphorbia milii - The bushy, spiny succulent develops shoots that can reach up to three to four feet in height, with a two-foot spread. It has half-inch thorns that adorn its branches and stems. The tough, leathery foliage grows on slender, young stems. Its leaves may defoliate if moisture stressed or with extreme temperature changes. The plant blooms intermittently throughout the year, but flowers are more prolific in the spring. Small flowers are surrounded by attractive bright red or pink bracts.