MARYLAND WEATHER SERVICE 4!»7 



Carduus discolor. Field Thistle. 



Throughout the state; in cultivated and waste grounds; frequent. 



Carduus lanceolatus L. 



Coastal Zone, introduced from Asia. 



Centaurea cyanus L. Corn-flower, Corn Blue Bottle. 



Throughout the state; in cultivated grounds; locally common. Intro- 

 duced from Europe. 

 Charles County, Cox (3540). 



