34 



„ V i ti Changes in colors of different species 



must be of advantage. Take a meadow 

 in which here and there occur groups of yellow flowered 

 meadow parsnip (Zizia), a little distance away is the 

 scarli't painted cup {Castilleia coccinea). In late summer the 

 white flowers of spotted cow-bane {Cicuta virosa variety ma- 

 culata) a group of yellow flowered goldenrod {Solidage Mis- 

 souriens's) are contrasted and the wild yellow lily (Lilium 

 panadense) is wholly unlike the purple fringed orchis {Haben- 

 aria psycoaes). The change in colors is often conspicuous in 

 closely related species, especially in some highly modified 

 flowers like Phlomis, Limium, Salvia, Delphinium^ Aquilegia 

 and Aconitum\ these species usually bear violet, blue, pink or 

 purple flowers. But when these are visited by the same 

 class of insects and growing in close proximity some of the 

 species have a different color, otherwise the end desired 

 would not be reached. ''Oar species of show this 



color range beautifully. M. didyma is bright red; M. fsitu- 

 is rose color varying to white; M. Bradhuriana is pale 



FIG. 19. 

 Fi{?. 19. Guides to honey. I. Pansy (TioXa trieolor). II. Carthusian Pink 

 (Dlanlhus cartusianorum). III. Wound-wort (Staehyapaluslris). IV. Field 

 pink (JHanthus dMoidea). [After Behrens ] 



purplish white; M. Punctata is yellowish." Some of our 

 violets are blue, some are white, others yellow. The cardin- 

 al ftower {Lobelia cardinalis) is bright cardinal; great lobelia 



