102 66. Cyperaceae. 1. Mapenia sylvatica. Maquire 2.2.831. W.Guinea 2. Cephelocarpus aff.rigidas Maquire 23455 " 3. " Lingerophyllum Kelly Tata 1035 # 4. Diplocerum capitatum Quatrecasas 4466. Rio Mete, La Foyata, 200m. Col. Los Planos. 5. Diplocerum corceina Caesius,Bustillo Blake 9383 6. " pysmacan Berris, " Blake 9384 Scirpus 7. Eleocharis a sp.? Williams 13895, Yarita,Amazona 8. Diplocerum aff.Longifolium Williams 13896 = Pterocarya guianensis Need 128m. Yarita 1-22-1942 Diplocerum = Hyphis in which minor Scales have not enlarged to form a perigynium. Diplocerum does not really differ from Selaria (intermedia types of hyppisnes occur in Selaria Diplocerum). Hyppiseae and Selereae of Pax (Siegler 41) are scarcely separate, if at all... Colythrea = Hyphis in which scales have not enlarged = Diplocerum ? 9. Mapenia sylvatica Kellps+ Quatrecasas 38982 Normal Cyperaceus flower - Colombia. 3xFlowers attached to subtyle dine. Three bracts close to flowers; three others, singly compressed outside, All subtended by an outer Cartilagineous host. Clarke Pfeiffer (1925) are entirely wrong. Structure as in Rhyz- ochrosma althythrum ; a single perfect flower with enveloping bracts. 10. Diplocerum confispium Quatrecasas, 17398 Llpt. Valle. Rio Cajambre 5-80 m. alt.