Pennsylvania for Sessions igioi-igoj. xlvii 



duction and Ravages of the Dryrot Fungus {Merulius lacry- 

 inans)." 



The director of the University Garden exhibited a collec- 

 tion of stove and greenhouse plants recently received from 

 London. These included several species and hybrids of 

 Nepenthes, Philesia and Lapageria, also Philageria, a 

 bigeneric hybrid between the two last species. 



November i. Dr. Miller, President, in the chair. Dr. 

 C. H. Shaw described the development of vegetation in 

 ponds. His observations were drawn from the region 

 around Wood's Holl, and have since been published in the 

 Botanical Gazette. 



Miss Marion IMackenzie then gave "A Synopsis and Com- 

 psrison of Flowering Records, kept by Mr. Theodore Rand, 

 at Radnor, Pa., for twenty years." These records showed 

 that the seasons 1894 and 1898 were exceptionally early, 

 alike in the blooming and leafing of spring plants, while the 

 spring of 1883 was the most backward on record. 



Dr. C. H. Shaw described "Alpine and Sub-Alpine Vege- 

 tation in Eastern North America." He stated that while 

 the Catskills were only sub-Alpine in their higher flora, the 

 .Vdirondack and White Mountain groups were truly Alpine 

 over five hundred to a thousand feet of their higher summits, 

 while both groups of mountains showed a striking similar- 

 ity in their flora. The Alpines tended to form low, moss- 

 like cushions, and their leaves were often small, wiry and 

 xerophytic. The modifying factors were strong winds, hot 

 suns and snow. 



The chairman then read a report from Miss Cavin of the 

 recent excursion of the Society to Haddonfield. 



Dr. Lefifmann spoke on the recent acquisition by a com- 

 pany of a large area of forest land for the manufacture of 

 paper pulp from the wood product. 



November 15. Dr. Miller in the chair. Mr. Cassius H. 

 Watson, B. S., read a paper on "The Structure and Rela- 

 tions of Chloroplasts," which is herewith published. 



