374 THE AMERICAN NATURALIST. [Vol. XXXVII. 



i yellow, 7 red and 3 blue flowers. The corolla is campan- 

 ulate or furmelform. In Ipomcea and Convolvulus many of the 

 flowers are bicolored, or tricolored. Ipomoea purpurea is purple, 

 pink, variegated, or white, and a variety in my garden produced 

 a purple flower striped with red, the whole flower fading to red. 

 Both red and purple flowers may occur on the same plant. /. 

 versicolor cultivated from Mexico has small, reddish flowers, 

 which change to orange and yellow. Convolvulus tricolor has a 

 blue corolla with a whitish throat and a yellow tube. The two 

 species of Quamoclit have scarlet, salverform corollas adapted to 

 humming-birds. The genus Cuscuta is a group of yellow, or 

 orange-colored, parasitie plants destitute of chorophyll, and of 

 world-wide distribution. The flowers are white or tinged with 

 rose. In Maine I have found that the visitors were small bees. 



The Polemoniaceae, or phlox family, are most abundant in the 

 Western States. In the Eastern States there are 7 white, 10 

 red, 3 purple, and 8 blue flowers. The corolla of Phlox is salver- 

 form, and several of the red species have been observed to be 

 fertilized by butterflies. Phlox panicnlata and P. drummouJii 

 are favorites in cultivation for th b 11 t ft t the)- produce 

 when massed. They have yielded innumerable shades and com- 

 binations of white, yellow, red and purple. A large number of 



red, purple, or even blue. A c urious eolor variation^ a peren- 



can Garden for January, 1890. "In the morning the flowers 

 were of a clear blue, remaining of this color until nearly noon, 

 when they gradually changed to a delicate pink and by evening 

 were a beautiful deep rose. This was repeated every day while 

 the plant was in bloom." Many handsome red and blue flowers 

 occur in the genus Gilia ; in G. tricolor the lobes of the corolla 

 are purple or white, and the throat brown purple, with a yellow 



Cobaa jeandens from "Mexico ^he flowers are at first green 



the Polemoniaceae, as in the Convolvulacea;, the flowers are 

 remarkable for the variety of their colors, for the number of 

 combinations of two or more colors in a single flower, and for 



