button bush, or cepalanthus occidentalis. spiky white balls of flowers in a dense spherical inflorescences

delicate details rubiaceae medicinal america gardening detail cephalanthus occidentalis insect background common buttonbush geometrical fragrant buttonwillow spherical ornamental garden plant tree nature blossom beautiful summer flora botany green botanical shrub flower butterfly corolla closeup blooming bud cream inflorescence original macro floral unusual close white bloom honeybells petals button bush cepalanthus spiky balls flowers dense inflorescences occidentalis inflorescences