Germination and Growth of Species of Salvia. 379 



moisture in the air about the plant, we cannot say whether 

 it is a movement commonly to be observed in nature with a 

 view to protect the tender leaves of the bud. The move- 

 ments of the leaves may readily be so influenced by too 

 great drought, when the soil in the pot becomes dry. 

 We attempted to ascertain whether in mature plants of these 

 and other species growing in the open air there was evident 

 movement, but our observations were perhaps too limited in 

 time to allow us to detect such. 



