34 



The Ohio Jotirnal of Science [Vol. XIX, No. 1, 



edly collected over in previous years. Examination showed 

 that all of these plants were hold-overs rather than seedlings. It 

 seems hardly credible that we could have been so careless 

 as to have overlooked them if they had put forth new growth 

 in the previous years, for when found they were growing 

 vigorously, flowering and fruiting freely. 



Photograph by B. B. Fulton 

 FIREWEEDS INJURED BY SAND BLAST. 



The few fireweeds which remain in the plowed field shown on pages 32 and 33 have 



had a hard time of it, being lopped over and cut to pieces or 



plastered up b\^ the sand blast. 



Although this situation would be difficult to account for 

 otherwise, it may not be justifiable to assign resurrection of 

 dormant roots as the cause for the reappearance of these species 

 on such slight evidence. But in Eqiiisetum arvense crucial 

 proof, of the ability of the underground parts to retain their 

 vitality when buried, was furnished when I found an old 

 rhizome of this species which I had exposed in excavation in 

 1915 that had put forth new shoots the following year. This 

 had been lying water-soaked in an old bog for three years. 

 When dug up, all of the plant remains, of which it was a part, 



