. Bulletin. Natural history; Natural history. August 1941 BELLROSE: DUCK FOOD PLANTS 267 Stable waters may be conducive to fruiting, but such conditions do not insure it, since many beds in stabilized water areas have produced no seed. River bulrush propa- gates largely by rootstocks. Much of the fruiting of marsh smart- weed, figs. 25 and 26, is directly dependent on water depth. When growing in water 3 to 18 inches deep, this smartweed pro- duces quantities of seeds, as observed at Fig. 28.—Water hemp or pig- weed liiberculalai. This plant forms a rank growth on mud flats, freque
. Bulletin. Natural history; Natural history. August 1941 BELLROSE: DUCK FOOD PLANTS 267 Stable waters may be conducive to fruiting, but such conditions do not insure it, since many beds in stabilized water areas have produced no seed. River bulrush propa- gates largely by rootstocks. Much of the fruiting of marsh smart- weed, figs. 25 and 26, is directly dependent on water depth. When growing in water 3 to 18 inches deep, this smartweed pro- duces quantities of seeds, as observed at Fig. 28.—Water hemp or pig- weed liiberculalai. This plant forms a rank growth on mud flats, frequently competing with Japanese millet. It is a good source of duck food, but not so good as either wild or Japanese millet. Pintails and mallards like the minute, dark- colored seeds of the water Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
