318 COLEOSPOKIACE.K 



the Swiss Stone Pine, however, will equally serve as host, as ba 

 shown by Tranzschel, and it 1ms been found "ii that tree in Russia and in 

 Switzerland. One ■>! these countries was probably the original home of 

 the parasite, from which it is spreading wherever its hosts will grow. 



This is one of the species with which attempts have been made to 

 produce infection by the use of tin- abundant spermatia (Klebahn, 

 Wirtsw. Rost. p. :i^7 , bul numerous trial- on healthy Weymouth Pines 

 well- .lit irely without result. 



Distribution: Europe (north of the Alps), Siberia, Japan, 

 North America. 



COLEOSPOPJACE.K. 



Jvidium furnished with a peridium. Spermogones sub- 

 epidermal, flattish, linear, without ostiolar filaments, dehiscing 

 by a slit. Teleutospores in one (more rarely two) subepidermal 

 layers, dividing as they mature into four superimposed cells, 

 each of which germinates by a sterigma bearing one basidio- 

 spoiv. 



( 'ui.KeM'oiUK.i:. Hetercecious. 



. Kcidia (Peridermiwn) more or less cylindrical, with inflated 

 peridium, irregularly torn at summit. Uredospores abstricted 

 in chains. Teleutospores with a strongly thickened gelatinous 

 wall above. Basidiospores ovate. Coleosporium. 



Ochropsore.e. Heteruecious. 



. Ecidia with cup-shaped peridium. Uredospores abstricted singly. 

 Teleutospores thin-walled. Basidiospores fusiform. 



(Jr/n-nj ,.<,,/•> i. 



Zaghouanisle. Autcecious. 



For the present, the abnormal genus Zaghouania may lie arranged 

 as a subfamily of the Coleosporiacese ; it is distinguished 

 especially by the fact that the four-celled basidium is formed 

 internally, but emerges from the teleutospore before the 

 formation of the round basidiospores. See p. 331. 



Zaghouania. 



The internal "basidium'" which has been considered as a 

 character of this family is not confined to it, being found also 

 in CJirysopsuro, which belongs to the Pucciniacese. It is 

 remarkable that no species of the family has up till now been 

 discovered in Australia, while only one of the Eurasian species 



