546 



Centaurca inclilcnsis (Malta thistle ; saucy sack ; cockspur th.) 

 Indigenous to Southern Europe, Northern Africa, and South- 

 Western Asia. A slender plant with few small entire leaves. 

 Flower heads small, always terminal, spinulous, and yellow. Height 



Centaurca calcitrapa ( 4< Purple star thistle.") 



to three feet and upwards, particularly when crowded. In New 

 South Wales this plant has become a great nuisance in wheat fields. 

 In Western Australia I have found it sparingly near Perth, but near 

 Pinjarrah it occurs abundantly. 



