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Fi. 21. WHITE DEADNETTLE (Lamium album). 



SECTION IV.-ON FLOWERS AND 

 INSECTS. 



I. 



I. THE flower of the common White Deadnettle 

 (fig. 22) consists of a narrow tube, somewhat ex- 

 panded at the upper end (fig. 23), where the lower 

 lobe of the corolla forms a platform, on each side of 

 which is a small projecting tooth (fig. 23, m). The 

 upper portion of the corolla is an arched hood 

 (fig. 23, co), under which lie four anthers (a a), in 

 pairs, while between them, and projecting some- 

 what downwards, is the pointed pistil (sf). At the 



