FOOD HABITS OF MALLAKD DUCKS. 



23 



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

 in which found — ■Continued. 



Kind of food. 



Total number of stomachs examined. 



SUBKINGDOM SPERMATOPHYTA— Continued. 

 Styracaceae: 

 . Styrax americana (smooth storax) 



Styrax pulverulenta (downy storax) 



Styrax sp. (storax) -. 



Oleaceae: 



Fraxinus sp. (ash) : . . 



Adelia acuminata (swamp privet) 



Menyanthacese: 



Menyanthes trifoliata (bog bean) 



Asclepiadace«: 



Asclepias sp. (mUkweed) 



ConvolvTilaceEe: 



Ipomaa sp. (morning-glory) 



Unidentified 



Cuscutacese: 



Cuscuta sp. (dodder) 



Boragiaacese: 



Heliotropium indicum (heliotrope) 



Heliotropium sp. (heliotrope) ' 



Verbenaceas: 



Verbena sp 



Lippia nodiflora 



Lippia sp 



Plantaginaceae: 



Plantago rugelii (plantain) , 



Bubiaceae: 



Cephalahthus occidentalis (buttonbush) 



Diodia virginiana (buttonweed) , 



Diodia teres (buttonweed) 



Diodia sp. (buttonweed) 



Galium sp. (cleavers) 



Psychotria tenuifolia 



Caprifoliacese: 



Triosteum perfoliatum (feverwort) 



Symphoricarpos racemosus (snowberry) 



Symplioricarpos sp. (snowberry) 



Ambrosiaceee: 



Ambrosia elatior (ragweed) 



Ambrosia trifida (ragweed) 



Ambrosia sp. (ragweed) 



Composita3: 



Eupatorium sp 



Helianthus sp. (sunflower) 



Bidens bidentoides (Spanish needles) 



Bidens cernua (btir marigold) 



Bidens frondosa (Spanish needles) 



Bidens sp. (Spanish needles) 



Carduus sp. (thistle) 



Unidentif-e:l 



Common 

 mallard. 



1,725 



104 

 2 



428 

 11 

 25 



2 

 10 



1 



1 

 2 

 1 



2 

 4 

 5 



Black 

 duck. 



Southern 

 black 

 duck. 



