MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



119 



Hypopitys Hypopitys (L.) Small. 

 Clumps of Hypopitys which were breaking through the soil near 

 the Marine laboratory at Cold Spring Harbor, Long Island, in 1899 

 were covered in such manner as to .exclude light. No appreciable 

 difference in the stature or appearance of these plants and others in 

 the light could be detected. This test was repeated at Woods Holl, 

 Mass., in the same year, and also at Priest River, Idaho, in the 

 following year with the same result. It is also notable that this 

 plant does not usually exhibit phototropic curvatures, although as 

 may be seen by reference to the historical sketch, many fungi are 

 capable of both etiolative and phototropic reactions. 



Fig. 75. Etiolated stems arising from tubercle of sweet potato. 



