This is Sowerbaea juncea, also known as Rush Lily, and Vanilla lily. This plant can have over 20 flower heads bunched together on a single unbranched stem. The flowers have a vanilla fragrance and delicate appearance. This plant can grow to a foot and a half high and likes to live in full sun to light shade. The gorgeous rose and mauve flowers are in bloom from the middle of the Spring until early Summer where they attract their fair share of butterflies. USDA Hardiness Zones 8 to 11