MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



225 



impinging rays of light seems to be inherited by individuals which 

 have never been exposed to light except in the period of the integra- 

 tion of the seed from which they grew. The actual degree of sensi- 



FiG. 165. B, etiolated stems of Aristolocliia. C, etiolated stems of Mettispennum. 



