18 



BULLETIN 120, U. S. DEPARTMENT OF AGRICULTURE. 



Table I. — Items of vegetable food identified in stomachs of mallard ducks and the number 

 in ^vMch found— Continued. 



Kind of food. 



Common 

 mallard. 



Black 

 duck. 



Total number of stomachs examined 



SUBKINGDOM SPERMATOPHYTA— Continued. 



Graminese — Continued. 



Oryza saliva (cultivated rice) 



Arena saliva (cultivated oats) 



Danlhonia sp. (oat grass) 



Sparlina sp. (salt-marsh grass) 



Leplochloa floribunda (feather grass) 



EragrosHs sp. (love grass) 



Monanthochloe UttoraUs 



Distichlis spicata (salt grass) 



Panicularia nervala (meadow grass) 



Poa sp. (meadow grass) 



Festuca brachyphylla (fescue grass) 



Bromus sp. (brome grass) 



Hordeum sativum (barley) 



Hordeum murinum (wild barley) : 



Triticum sestivum (wheat) 



Cyperaceee. 



Unidentified sedges 



Cyperus esculentus (chufa) 



Cyperusferax (chufa) 



Cyperus sp. (chufa) 



Scirpus paludosus (prairie bulrush) 



Scirpus fluvialilis (river bulrush) 



Scirpus cubensis (bulrush) 



Scirpus americanus (three-square) 



Scirpus pauciflorus (club-rush) 



Scirpus sp. (unidentified bulrush) 



Eleocharis sp. (spike-rush) 



Fimhristylis sp. (sedge) 



Psilocarya nilens (bald rush) - 



Psilocaryasp. (bald rush) 



Cladium effusum (saw grass) 



Cladium mariscoides (twig rush) 



Phynchospora corniculala (pollywog) 



Rhynchospora sp. (beaked rush) 



Dichromena sp 



Scleria reticularis (nut rush) 



Scleria torreyana (nut rush) 



Scleria sp. (nut rush) 



Carex decomposita (panicled sedge) 



Carexlupulina (hop sedge) 



Carex lupuliformis (hop sedge) 



Carex gigantea (hop sedge) 



Carex sp. (sedge) 



Aracese. 



Pettandra virginica (hog wampee) 



Lemnacea. 



Lemna minor (small duckweed) 



Lemna Irisculca (star duckweed) 



Lemna sp. (unidentified duckweeds) 



1,725 



114 

 1 

 10 



45 



540 

 37 



279 

 3 

 10 



239 



10 

 1 



247 



3 



194 

 30 

 25 



