6802 Swida Opiz
- Opiz in Bercht. & Opiz, Oekon.-Techn. Fl. Böhm. 2, 1: 174 (1838).
- Thelycrania (Dumort.) Fourr., Ann. Soc. Linn. Lyon, sér. 2, 16: 394 (1868).
Notes: The Eurasian and the North American plants of Swida are often treated as two subspecies but differ consistently in several characters. We accept two species in accordance with recent North American and Russian usage.