Heliopsis helianthoides (L.) Sw. (syn: Buphthalmum helianthoides L. (ambiguous synonym); Helepta angustifolia Rafin.; Helepta grandiflora Rafin.; Helepta parviflora Rafin.; Helianthus laevis L. (ambiguous synonym); Heliopsis helianthodes (L.) Kuntze; Heliopsis helianthoides (L.) Britt., Stern & Pogg.; Heliopsis helianthoides var. solidaginoides (L.) Fern.; Heliopsis laevis (L.) Pers. (ambiguous synonym); Heliopsis oppositifolia (L.) Druce (ambiguous synonym); Rudbeckia oppositifolia L.; […]