30 DEADNETTLE. [CHAP. 



it may be well to verify it in some plant with larger 

 flower-heads, as the Dandelion (in which all the florets 

 are irregular) or the Thistle (in which they are all regular). 



FIG. 19. Disk floret of Dais}', the corolla and cohering (syngenesious) 

 anthers laid open. 



It will be found that the stamens cohere by their anthers. 

 On this account they are termed syngenesious. The 

 coherent anthers form a tubular sheath which closely 

 surrounds the style. The pistil we may infer to be 

 syncarpous from the two-lobed stigma, notwithstanding 

 that the inferior ovary is one-celled. 



In the Daisy we have .-calyx superior, gamosepalous ; 

 corolla gamopetalous, regular (disk), or irregular (ray) ; 

 stamens' epipetalous,pentandrous, anthers syngenesious j 

 pistil syncarpous, ovary inferior. 



9. White and Purple DZADNETTLE. Either will do. 

 The cut represents the former, which has rather . larger 

 flowers. The calyx is free, but the sepals, five in number, 

 as indicated by the five acute teeth, are coherent. The 

 corolla is gamopetalous and irregular, the divisions 

 being unequal. The stamens, easily found on pulling 

 out a corolla from the calyx and cutting it open on the 



