Neillia monogyna var. malvacea Opulaster malvaceus Opulaster pauciflorus Opulaster pubescens Neillia torreyi Physocarpus pauciflorus Spiraea opulifolia unr. pauciflora Neillia malvacea Physocarpus pauciflorus Spiraea opulifolia var. pauciflora
World Flora Online, accessed June 20, 2024