扁芒菊新是一种多年生草本。Waldheimia tridactylites Kar. et Kir. in Bull. Soc. Nat. Mosc. 15: 126. 1842; Ostenf. et Paulsen in Hedin， S. Tibet 6 (3) 38. 1922; Tzvel. in Fl. URSS. 26: 269. 1961; 中国高等植物图鉴4: 503.图6419. 1975.——Allardia tridactylites (Kar. et Kir.) Sch.-Bip. in Pollichia 20-21: 442. 1863.