178 MEMOIRS OF THE NEW YORK BOTANICAL* GARDEN. 



in March. These leaves showed torsions of the basal portion, and at- 

 tained a length of 18 to 20 cm., which was not in excess of the normal. 

 The over-arching hood was found in the etiolated leaf as a conical pro- 



FiG. 138. Etiolated cultures o£ Saumrus centutts. A, lamina and portion of pet- 

 iole of etiolated leaf. 



