MUENSCHER: AQUATIC PLANTS 65 



Nymphaea ampla (Salisb.) DC. 



Infrequent in shallow bays and sluggish streams. Rio Dulce, near mouth of 

 Rio Lampara, 12619; pond near northwest corner of Lake Amatitlan. 



CRUCIFERAE 



Nasturtium officinale R. Br. 



In small streams in the mountains at 10,000 ft. elevation. Mount Maria 

 Tecum, 12047. 



RHIZOPHORACEAE 



Rhizophora Mangle L. 



Medium-sized trees with prop-roots in soft mud on tidal flats, Rio Dulce 

 and Golfete. Rio Dulce, 12017. 



ONAGRACEAE 



Jussiaea peruviana L. 



In shallow water and on marshy banks of streams. Rio Siguacan, 12029. 



Jussiaea repens L. 



In shallow water in lakes and sluggish streams. Lake Atitlan, 12059. 



Jussiaea suffruticosa L. 



In shallow water and marshes bordering on lakes and streams. Lake Atit- 

 lan, 12058; Pancajche, 12558. 



UMBELLIFERAE 



Hydrocotyle mexicana Cham, and Schlecht. 



Wet banks of streams. Coban, 12027 ; Finca Helvetia, Esquintla, 12045. 

 Hydrocotyle umbellata L. 



In shallow water and on sandy shores of lakes and ponds. Finca Moca, 



12038; Lake Atitlan, 12057. 



PODOSTEMACEAE 



Maranthrum foeniculaceum H. & B. 



On boulders in swift streams on the Pacific slope. Rio Lima, 12034, 12035. 

 Maranthrum Schiedeanum Cham. 



On boulders in swift streams on the Pacific slope. Rio Siguacan, 12031. 

 Tristicha hypnoides (St. Hil.) Spreng. 



On boulders in swift streams, usually associated with the two preceding 



species. Rio Lima, 12033 ; Rio Siguacan, 12030. 



LENTIBULARIACEAE 



Utricularia obtusa Sw. 



In sluggish backwaters, Rio Dulce, 12616. 



Department of Botany, Cornell University 

 Ithaca. New York 



