90 MISSOURI BOTANICAL GARDEN BULLETIN 
Natural 
Botanical name Common name Locality distribution 
Sonchus oleraceus........,.Annual 
sow-thistle ....Waste places, 
COMMON . «i <5 Europe 
Taraxacum officinale...... Dandelion ....... Lawns, fields and 
meadows every- 
where ........ Europe 
PLANTS INTRODUCED BY RIVERS, NATIVE 
Brickellia grandiflora..... Large-flowered 
thoroughwort ..River banks..... Mont. to S. 
Mo., N. M., 
west to 
Ore. and 
Ariz, 
Cenchrus tribuloides...... Bur-grass ........River banks and 
: bottoms .......Me. to Minn., 
south to 
Fla. 
Cleome graveolens........ Clammy-weed ....Sandy and gravelly 
river banks....N. W. Terr. 
south to 
Pa., Kan. 
and Col. 
Cucurbita foetidissima....Wild pumpkin....Gravel banks... .Neb. to Tex. 
and Mex. 
Cycloloma atriplicifolium..Cycloloma ........River banks..... Minn. to Ind. 
and IIL., 
west toN. 
W. Terr.,, 
Neb. and 
Ariz, 
Martynia louisiana........Unicorn plant....River bottoms. ...Ind. and Ia. 
to Mex. 
PLANTS INTRODUCED BY RIVERS, EXOTIC 
Atriplex patula var 
er Halberd-leaved 
orache ........ Waste places.....Europe 
Cucurbita Pepo var. 
pyriformis ............. Pumpkin........ Along streams, 
river bottoms.. Asia 
Minor 
