The tiny, yellow buds at the center of poinsettia (Euphorbia pulcherrima) blooms are actually the unimpressive flowers. The colorful red, white, pink or rarely pale orange bracts surrounding these flowers are merely colorful leaves. Some varieties have marbled, blotched or spotted bracts. Compact potted plants that are mostly less than two feet tall and broad can get quite lanky and taller than ten feet in the garden. The dark green leaves are about three to five inches long.