Ayensu, Edward S Leaf anatomy and systematics of New World Velloziaceae Edward S. Ayensu - City of Washington Smithsonian Institution Press 1974 - v, 125 p.: ill. ; 27 cm. - Smithsonian contributions to botany ; no.15. . p. 72. LCCN: 73-015606 //r85 Subjects--Topical Terms: VelloziaceaeLeaves--AnatomyBotany--America