COMPOUND FLOWERS. 



353 



CARLfNA VULGARIS (Common Carline Thistle). 



20. CARLINA (Carline Thistle). 



1. C. vulgdris (Common Carline Thistle). The only 

 British species, growing on dry heaths, especially near 

 the sea. Eeadily distingiiished from every other British 

 Thistle by the long inner scales of the involucre, which 

 are straw-coloured and glossy, and spread in a radiate 

 manner so as to resemble petals. In dry weather they 

 lie flat, but when the atmosphere is moist, they rise and 

 form, as it were, a pent-house over the florets. Their 



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