22 WEEDS OF I ARM LAND 



narrow wing is developed, but this is so small in proportion 



A 



D 



FIG. 7. WINGED SHEDS AND FRUITS. 



A. Winged Seed of Yellow Rattle (Rhinanthits crista-galli). 



B. Winged Seed of Spurry (Spergula arvtnsis). 



C. Winged Fruit of Hogweed (Heraclcum Sphondylium). Wing developed from 



Fruit Coat. 



D. Winged Fruit of Broad-leaved Dock (Rumcx obttisifolim). Wing consists of 



persistent Perianth. 



(The small sketches are natural size.) 



to the size of the seed that it is doubtful if it is an effective 

 agent in distribution. 



