Flowers are 2-2.5 cm wide with twenty to fifty pink through white flowers borne on umbrella shaped clusters. Anthers are red. There are 9 stamens ranged in an inner whorl of 3 and outer whorl of 6. Leaves are green and sword-shaped, originate from base of plant, and are triangular in cross-section, twisted toward the tip, and feel spongy when compressed. Stems are erect and triangular near the base. Plants grow to 150 cm.