xii.] PINE-BLISTER. 267 



and found his results correct. Hartig, for instance, to 

 whose indefatigable and ingenious researches we owe 

 most that is known of the disease caused by the 

 Peridermium, has confirmed Wolff's results ; and in 



FIG. 41. A spore of Peridermium Pint germinating. It puts forth the long, 

 branched germinal hyphae on the damp surface of a leaf of Senecio, and one of 

 the branches enters a stoma, and forms a mycelium in the leaf : after some time, 

 the mycelium gives rise to the uredospores and teleutospores of Coleospotium 

 Senecionis. (After Tulasne : highly magnified.) 



this country Mr. Plowright has successfully repeated 

 the culture. 



It was to the brilliant researches of the late Prof. 

 De Bary that we owe the first recognition of this 



