Megapterium missouriense (Sims) Spach [ Oenothera missouriensis Sims]
      
no HD illustration available (m3)
6 1188293 Megapterium missouriense (Sims) Spach [125 710278 Oenothera missouriensis Sims] Onagraceae
T. Meehan, Native Fl. Ferns U.S., ser. 2, vol. 1 : p. 157, t. 39 (1880) [A. Lunzer]