Proceedings of the Club 363 



Dr. Britton expressed the hope that field notes on this genus 



would be made during the coming season. 



Eupatorium 



pnrp 



trifoliatum. The first two were collected at Copake Iron 



Works last summer on a field excursion of the Club. 



E. purpureum, with thin almost glabrous leaves, with sharp 

 teeth, grows in woodland and copses. 



E. maculatum has leaves thick and rugose with prominent veins, 

 broader and more ovate, and not as sharply serrate as the last ; 

 stem rough and spotted ; grows in open meadows. 



E. trifoliatum has been found in the south, as far north as 

 Pennsylvania ; it was named by Elliott, E. ternatum. The essen- 

 tial distinction of this species is the crenate leaves ; the stem is 

 smooth, the leaves narrower and inflorescence often larger than in 



purp 



MacDo 



in the swelling of seeds ; a strong iron pipe was filled with peas 

 and water, and a test-tube inserted in the top. In 24 hours from 

 the time the peas were put in a pressure was registered of eight 

 atmospheres, or 120 pounds to the square inch, the highest pres- 

 sure hitherto recorded by this means. Professor Underwood called 

 attention to the action of fleshy fungi in lifting heavy paving stones 

 in their growth. 



Dr. MacDougal also discussed malformations in Arisaema. 

 He called attention to the fact that early specimens may be in- 

 fested with a fungus growth which causes the hood to stand erect 



It was voted that future meetings of the Club at the Garden be 

 held at 3:30 instead of 4 o'clock. 



Delia W. Marble, 



Secretary pro tern. 



Tuesday, March 12, 1901 



M 



chair. Dr. D. T. MacDoug 

 Thirty persons were present. 



M., with Dr. Allen in the 

 pointed secretary pro tern. 



The scientific program was presented as follows : 



