color, as seen when either yellow, green, red, purple, or 

 blue or other color fades and disappears from the petal. 

 This white may be pigmental or the white of the original 

 color of the tissue, the chlorotic white, as seen in the em- 

 bryo of the seed, and commonly in the earliest growth of 

 roots and stems. A common garden bean when split open 

 will show not only the thick white cotyledons, l)ut a st'cond 

 pair of delicately veined leaves white as marble, which on 

 germinating change to green. One-half of all so-called 

 white flowers are no whiter than this primitive white tissue. 



There are differently constituted whites as well as yellows. 

 This last mentioned white color is not produced by a ])ig- 

 ment ; there is no coloring matter, but the whiteness is an 

 optical effect similar to that seen in snow which dissolves 

 into colorless water. It is caused by minute bubbles of air 

 in the (!ell walls which reflect white light. There does not 

 api)ear, however, to be any dividing line between a trans- 

 lucent, structural white, as seen in the embryo, the Easter 

 lily, etc., and a i)igmental chalky white as seen in the rays 

 of a daisy, which latter is occasioned by numerous small 

 granular l)odies in the cells of the tissue known as louco- 

 phytes. 



Lest the exam})les of Cyprij)e(liums might appoar to be 

 exceptional, we add a list of other green ilowers l)oth showy 

 and inconspicuous. 



Zy(iopetalum, green with darker markings of brown 



Lyamie gigantea. olive-green, lij) maroon ;ind orange. 



Do. ciliata, green, li}) white and buff yellow. 



Ci/cnodie, four species, green suffused with purple. 



Angroicum sesquq)edale, light green, spur ten inchi's long. 



Gtdeandra, several s})ecies, green with lips white or rose. 



Caitlei/a bicoloi- cwndea, green, lip sky-gray. 



Coilogi/ne pandiDutd, pale green, li[) yellow-green. 



Eitcomis, eight or more species, green. 



>Sel€)iij)ediu)its, ten species, green shaded with reddish- 

 brown. 



