MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 1 7 



A continuation of the etiolation of inflorescences after Sachs' 

 method was undertaken by Askenasy/^ who found that flowers of 

 Hyacinthus 07'tcntalis, Scilla canipanulata, Palnionaria officin- 

 alis^ Orchis ustidata^ Silene f>edula^ Antirrhinum niajus, Digi- 

 talis purpurea and Prunella grandijlora did not exhibit the nor- 

 mal color scheme. Not only were green floral envelopes blanched, 

 but variations in the depth of other pigmentated areas were observ- 

 able. 



HeckeP^ believed he had demonstrated that certain organs, 

 which were normally irritable to contact, went into a condition of 

 rigor in darkness, an observation that could not be confirmed by 

 Pfeffer. 



Baranetzky ^'' investigated the relation of the rate of growth to 

 darkness and illumination with the result that he concluded that the 

 daily periodicity in growth was not due directly to the alternating 

 periods of illumination and darkness, but was an after effect. Thus 

 plants exhibiting daily periodicity in the rate of growth did so on 

 several successive days when placed in darkness, and after the 

 rhythm was lost in darkness it was again taken up after exposure to 

 illumination for twelve hours. 



Brefeld*- observed that the growth and development of fungi is 

 more or less dependent upon light, and that sporophores of many 

 fungi exhibited excessive elongation in darkness. The sporophore 

 of Pilobolus microsporus attained a length of half an inch in light 

 and of 8 to lo inches in darkness. 



Schulzer von Muggenburg reported a number of collected ob- 

 servations concerning the relations of fungi to light which are in 

 harmony with Brefeld's results. ^^ A large number of notices showing 

 that different species of fungi exhibit the most diverse reactions to 

 the presence and absence of light were published between 1875 and 



55Askenasv, E. Ueber den Einfl-.iss des Lichtes auf die Farbe dei" Bluthen. Bot. 

 Zeituncr, 34 : 1,27. 1S76. 



56 Meckel, E. Du mouvement vegetal. Paris. 1875. Review bv Pfeffer in Bot. 

 Zeitung, 34 : 9. 1S76. 



5^ Baranetzky, J. Die selbststJindige tiigliche Periodicitiit im Langenwachstiim der 

 Internodien. Bot. Zeitung, 35 : 639. 1S77. 



58 Brefeld. Ueber die Bedeutung des Lichtes fiir die Entwickelung der Pilze. Bot. 

 Zeitung, 35: 386. 1877. Also, Sitzungsber. d. Ges. Naturf. z. Berlin. April. 

 1877. 



59 Schulzer von Muggenburg. Des allelebenden Lichtes Einfluss auf die Pilzwelt. 

 Flora, 61 : 119. 187S. 



