14 



BULLETIN 171, U. S. DEPARTMENT OF AGRICULTURE. 



English hawthorn (Cratcegus oxy- 



cantha) 2 



Strawberries (Frag aria sp.) 6 



Blackberries or raspberries (Rubus 



sp.) 47 



Domestic cherries {Primus cera- 



sus) 34 



Domestic prunes (Prunus domes- 

 tical 2 



Wild black cherries (Pruns sero- 



tina) 28 



Chokecherries (Prunus virgin- 



iana) 12 



Bird cherries (Prunus pennsylva- 



mca) 8 



Cherries unidentified {Prunus sp.)- 7 



China berries (Melia azederach)- 58 



Wood sorrel (Oralis sp.) 1 



Staghorn sumac (Rhus typMna) — 3 



Smooth sumac (Rhus glabra) 19 



Dwarf sumac (Rhus copallina) — 10 



Poison ivy (Rhus radicans) 3 



Small-leaved sumac (Rhus micro- 



phylla) 1 



Sumac unidentified (Rhus sp. ) — 12 



Pepper berries (Schinus molle) — 20 



American holly (Ilex opaea) 19 



Deciduous holly {Ilex deeidua) 12 



Black alder (Ilex verticillata) 3 



Holly unidentified (Ilex sp.) 6 



Strawberry bush ( Evonymus 



americana) 2 



Burning bush (Evonymus sp.) 1 



Roxbury waxwork ( Celastrus 



scandens) 2 



Supple Jack (Berchemia volu- 



bilis) 9 



Cascara sagrada (Rhamnus pur- 



sliiana) 1 



Woodbine (Psedera quinquefolia) _ 21 

 Northern fox grape (Vitis la- 



brusea) 1 



Summer grape (Vitis rest ivalis) 1 



Frost grape (Vitis cordifolia) 1 



Before dismissing the subject of vegetable food it is of interest to 

 note that seeds of the California poison oak (Rhus diversUoba) were 

 not found in the stomachs of west-coast robins. This appears the 

 more singular when it is noted that the birds feed freely upon other 

 species of Rhus: that this species is one of the most abundant shrubs 

 in California, and in full fruit in the wintertime, when the robins 

 are there; and that it is a favorite food of many species of winter 

 birds. As the seeds of this plant are either regurgitated by birds or 



California wild grape (Vitis eali- 

 fornica) 1 



Unidentified grapes (Vitis sp.) 17 



Flowering dogwood (Cornus flor- 

 ida) 59 



Rough-leaved dogwood (Cornus as- 

 perifolia') 3 



Panicled cornel (Cornus panicu- 

 lata) 3 



Alternate-leaved cornel (Cornus 



alternifolia) 1 



Black gum (Xyssa sylvatica) 11 



Tupelo (Xyssa aquatica) 6 



Huckleberries (Gaylussacia sp.)— 4 

 Small cranberries (Vaccinium ory- 



coccus) 2 



Blueberries (Vaccinium sp.) 42 



Persimmons (Diospyrus virgin- 



iana ) 22 



Olives (Olea europwa) 1 



Button weed (Diodia teres) 2 



Japan honeysuckle (Lonicera ja- 



ponica ) 1 



Snow berries (Symphorocarpos 



racemosa) 4 



Arrow-wood berries (Viburnum 



dentatwm ) 3 



Black haw (Viburnum pruni- 



folium ) 2 



Viburnum unidentified (Viburnum 



sp.) 1 



Black elderberries (Sambueus 



canadensis) 8 



Red elderberries (Hambucus pu- 



bens) 2 



Elderberries unidentified ( Sambu- 



cus sp.) 5 



Common ragweed (Ambrosia ar- 



temisiifolia ) ■. 1 



Other ragweeds (Ambrosia sp.) 7 



Sunflower ( Helianthus sp.) 1 



Dandelion (Taraxicum sp.) 3 



Fruit not further identified 71 



