FOOD HABITS OF SHOAL-WATER DUCKS. 



51 



Table I. — Items of vegetable food identified in the stomachs of the ducks treated in this 

 bulletin and the number of stomachs in which found — Continued. 



Kind of food. 



Total number of stomachs examined 



Subkingdom SPERMATOPHYTA— Continued. 

 Cyperaceae. 



Unidentified sedges 



Cyperus esculentus (chufa) 



Cyperus sp. (chufa) 



Dichromena sp 



DulicMum arundinaceum (three-ways sedge) . . 



Eleocharis sp. (spike rush) 



Fimbristylis sp 



Scirpus pauciflorus (few-flowered bulrush) 



Scirpus americanus (three-square) 



Scirpus paludosus (prairie bulrush) 



Scirpus robustus (salt-marsh bulrush) 



Scirpus fluviatilis (river bulrush) 



Scirpus cubensis (bulrush) 



Scirpus validus (great bulrush) 



Scirpus sp. (unidentified bulrushes) 



Fuirena squarrosa (umbrella-grass) 



Fuirena sp. (umbrella-grass). 



Khynchospora corniculata (beaked rush) 



Rhynchospora sp. (beaked rush) 



Cladium effusum (saw grass) 



Cladium mariscoides (twig-rush) 



Scleria sp. (nut rush) 



Car ex decomposita (panicled sedge) 



Carex lupuliformis (hop sedge) 



Carex sp. (sedge) '. 



Araceae. 



Peltandra virginica (arrow-arum) 



Symplocarpus foetidus (skunk cabbage) 



Lemnaceae. 



Spirodela polyrhiza (big duckweed) 



Lemna perpusilla (minute duckweed) 



Lemna minor (small duckweed) 



Lemna sp. (unidentified duckweeds) 



Eriocaulaeeae. 



Eriocaulon decangulare (pipewort) v 



Eriocaulon sp. (pipewort) 



Pontederiaceae. 



Pontederia cordata (pickerel weed) 



Heteranthera dubia (water star-grass) 



Heteranthera sp. (mud plantain) 



Juncaceae. 



J uncus sp. (bog rush) 



Liliaceae. 



Polygonatum biflorum (hairy Solomon's-seal).. 



Smilax sp. (greenbriar) 



Haemodoraceae. 



Gyrotheca tinctoria (red-root) 



Piperaceae. 



Saururus cemuus (lizard's-tail) 



Gad- 

 wall. 



ISO 



27 



24 



2 



2 



Bald- 

 pate. 



255 



Green- 

 winged 

 teal. 



653 



121 



46 

 40 

 5 

 13 

 38 

 205 



62 



Blue- 

 winged 

 teal. 



319 



2 



184 



57 



Cinna- 

 mon 

 teal. 



Pin- 

 tail. 



790 



29 



45 

 61 



5 

 155 

 24 

 24 



3 



154 

 1 

 1 



7 



103 

 1 



Wood 

 duck. 



