PROPAGATION OP WILD-DUCK FOODS. 3 



Tabus I. — Wild-ducJc foods not at 'present on the market — Continued. 



No. 



Common name. 



Scientific name. 



General range. 



Local conditions. 



32 



Smartweed 



Do 



Polygonum amphibium 



Polygonum pennsylvani- 



cum. 

 Polygonum opelousanum . . 

 Polygonum hydropiper- 



oides. 

 Polygonum hydropiper. . . . 

 Polygonum punctatum . 

 Polyoonum sagittatum 







33 



do 



Wet soil. 



34 



Do....' 



Eastern States 



United States 



Do. 



35 



Do 



Do. 



36 



Do 



Northern Hemisphere. 



North America 



United States 



Do. 



37 



Do 



Do. 



3S 



Do 



Do. 



39 





Northern Hemisphere. 



Salt marshes and sea 



40 



Do 



Salicornia ambigua 



beaches. 

 Do. 



41 



Water primrose 



Water pennywort 



Southeastern States . . . 



Swamps. 



42 



Hydrocotyle umbcllata 



Do. 









Were all these plants available to persons interested in improving 

 the food supply of wild ducks the outlook would be most satisfactory, 

 for from these and the plants hitherto listed and described something 

 of value could be selected for almost any environmental condition. 



Classifying the plants recommended for propagation according to 

 the conditions to which they are suited, we have as a salt-water plant, 

 eelgrass ; for brackish water, widgeon-grass, sago pondweed, and wild 

 celery, all of which also grow in fresh water, the last two abund- 

 antly; for fresh water with slight current, wild rice, wild celery, all 

 the pondweeds, and watercress; for fresh water that is quiet except 

 for wind currents, pondweeds, banana waterlily, musk grasses, 

 waterweed, and coontail; for the border line between water and 

 marsh or for shallow fresh water, delta potato, wapato, wild 

 millet, frogbit, and thalia; for small openings in marshes or other 

 absolutely quiet waters, duckweeds; for the margin of fresh water 

 where there is no marsh, wild millet ; for land dry in summer and 

 overflowed in winter, chufa and wild millet; for bodies of fresh 

 water, almost always full but sometimes drying up in summer, in 

 shallow places wapato and delta potato, and in deeper water, the 

 tuberous white waterlily; and for swamps, swamp privet and water 

 elm. 



A recent study of the vegetation of the lakes of the Nebraska sand- 

 hill region discloses the important fact that widgeon-grass and sago 

 pondweed withstand alkaline conditions better than any other plants. 

 It is probable that wild celery also will be found to have a degree 

 of endurance of alkalinity. 



Some of the new plants listed in Table I are especially desirable, 

 because they are suitable for certain situations besides those inhabited 

 by the plants mentioned, in the last two paragraphs. They include 



