102 



The scientific program consisted of three papers : 



Miss L. O. Gaiser discussed the "^ Method of Cell-division in 

 Pollen-mother Cells of Plants." Her study was based chiefly 

 upon processes observed in AntJiiiriuui. 



Dr. Michael Levine considered " The Relation of the Host Plant 

 to the Size of the Crown Galls of the Beet." He illustrated his 

 discussion with views showing the size and different forms of 

 crown gall observed. The fact chiefly emphasized was that the 

 largest tumors develop on the largest and most vigorous hosts. 

 Plants well nourished, especially if on enriched soil, suffer severely. 



Mr. C. A. Schwarze discussed " Cleavage Processes in the 

 Sporangia of Certain Fungi." The spore formation in Olpidiopsis 

 was carefully described and illustrated. Cleavage furrows cutting 

 outward from a central vacuole cut up the protoplasm into spores. 

 The method of spore formation by means of cleavage furrows was 

 described for CircincUa minor, Sporodinia grandis, and Miicor 

 raccmosns, and compared with the method of spore formation by 

 cleavage furrows in Olpidiopsis and Saprolcgnia. It was shown 

 that in all the forms studied the cleavage is progressive. The for- 

 mation of the columella in the Zygomycetes was accounted for in 

 a manner diff'ering from that described and illustrated in some of 

 our standard textbooks. 



Meeting of May io, 1921 



Mr. Leroy Jeffers gave an illustrated lecture on " Mountaineer- 

 ing in the Pacific Northwest, with especial reference to the flora 

 of Mount Rainier." He showed an extensive series of views of 

 magnificent mountain scenery, largely of alpine meadows and 

 glaciers. Detailed views of plants were shown, or more usually 

 views of these massed in their native settings. Lupines, Rhodo- 

 dendrons, Cassiope, Castillejas, Xerophyllum, were some of the 

 most interesting. The speaker had climbed many peaks of the 

 Northwest and his photographs were excellent in technique. 



• Meeting of May 25, 192 1 

 The meeting of the Torrey Botanical Club was held jointly with 

 the Wild Flower Preservation Society at the Mansion, New York 

 Botanical Garden. 



