no HD illustration available (m2)
Pentodon pentandrus (Schum. & Thonn.) Vatke {80 498188 Hedyotis pentandra Schum. & Thonn.}
D.S. Correll, H.B. Correll, Aquatic Wetl. Pl. SW U.S.: , fig. 725 (1972) [unsigned]