TY - JOUR T1 - First record of Echinochloa stagnina (Poaceae) for Puerto Rico and key to the Echinochloa in the West Indies JF - Sida Y1 - 1993 A1 - P.M. McKenzie A1 - P.W. Michael A1 - L.E. Urbatsch A1 - R.E. Noble A1 - G.R. Proctor SP - 527 EP - 532 VL - 15 IS - 3 ER -