76a. 
Lemna 
Lemna minor L. Duckweed 
Ivy Neck. Abundant on surface of small cut-off pond near Sand 
Point on Cheston Peninsula. Hectare 4870. Associate species: 
Spirodela polyrhiza above. Higman 1225. 
Spirodela 
Spirodela polyrhiza (L.) Schleid. Water-flaxseed 
Ivy Neck. Abundant on surface of small, fresh to slightly 
saline cut-off pond near Sand Point on Cheston Peninsula. Hectare 
4872. Associate species: Lemna minor, Rumex verticillatus, 
Sparganium eurycarpum. Higman 1226. 
COMMELINACEAE 
Commelina 
Commelina communis L., 
var. ludens (Miquel) C. B. Clarke Dayflower 
Java Farm. Infrequent along Old Muddy Creek Road and in ditch at 
entrance gate. Partly shaded by adjacent canopy of Fagus grandifolia, 
Quercus alba, and Liriodendron tulipifera. Associate species: Poly- 
gonum spp-, Oxalis stricta, Galium aparine, Dactylis glomerata, Geranium 
carolinianum, Sphe Sphenopholis nitida, Tovara virginiana, Hieracium scabrum. 
Higman 352, 
PONTEDERTACEAE 
Heteranthera 
Heteranthera reniformis R. & P. Mud-plantain 
Ivy Neck. One station: ‘muddy bank of artificial pond at source 
of Cheston Creek drainage, on Murray farm. Associate species: Gratiola 
neglecta, Ranunculus sceleratus. Higman 874. 
