Orchid Diseases 303 



often slightly curved. The spores germinate 

 quickly, usually after forty-eight hours. Glceospo- 

 rium affine is troublesome on orchids in Europe, but 

 has not yet proved very serious in the United States. 



Other Orchid Glceosporiums 



Glceosporium oncidii Oud.= G. maxillaricz All. 

 This organism is confined to leaves of Maxillaria 

 infestans. 



Glceosporium epidendri} Henn. This organism 

 attacks stems of Epidendrum sp. 



Glceosporium stanhopea AUesch. is found on 

 leaves of Stanhopese. 



Glceosporium Idlicz Henn. is found on leaves of 

 Laelia sp. 



Glceosporium pallidum Karst. and Har. occurs on 

 leaves of Liparis longipes. 



Colletotrichum orchidearum K. and H. appears on 

 leaves of Bolbophyllum labbi, B. longiflorum. It 

 is also found on foliage of Cymbidium sp., Physio- 

 phon loddigesii ; Ezia stelleta, Coelogyne mayeriana, 

 Pleurothallis tribuloides, Sarcanthus pugioniformis, 

 on pseudobulbs of Eulophia saundersiana and on 

 Oncidium pulvinatum. 



Colletotrichum dichecz Henn. grows on foliage 

 of Dichsea vaginata. 



Colletotrichum roseolum Henn. develops on the 

 pseudobulbs of Stanhopea oculata. 



