20 



NEW YORK STATE MUSEUM 





TENUIFOLIAE 



Crataegus 



bella 5*. 



C. 



boothiana S. 



C. 



claytoniana S. 



c. 



conferta S. 



c. 



fucata vS". 



c. 



gracilipes 6'. 



c. 



ignea S. 



c. 



insignata S. 



c. 



leptopoda S. 



c. 



luminosa ^. 



c. 



nescia 6". 



c. 



recta S. 



c. 



slavini S. 



c. 



spatifolia S. 



c. 



suavis S. 





MOLLES 



Crataegus 



radians 5". 





FLABELLATAE 



Crataegus 



dayana vS'. 



C. 



gloriosa 5". 



c. 



letchworthiana 



c. 



limosa 5. 



c 



steubenensis S. 



COCCINEAE 



Crataegus chateaugayensis 

 C. harryi 6". 



5. 



Crataegus neobaxteri S. 

 C. puberis S. 



C. spissa 6*. 



C. verrucalis Pk. 



INTRICATAE 

 Crataegus cornellii S. 



ANOMALAE 



Crataegus 



affinis S. 



C. 



brachyloba 5. 



C. 



floridula 5". 



C. 



inopinata S. 



C. 



repulsans S. 



C. 



simulans S. 



C. 



singularis S. 





TOMENTOSAE 



Crataegus 



admiranda ^9. 



C. 



calvini vS". 



c. 



comans ^. 



c. 



efferata 5. 



c. 



finitima S. 



c. 



frutescens S. 



c. 



honeoensis S. 



c. 



spinifera S. 



c. 



structilis Ashe 



c. 



venustula S. 



Cronartium ribicola Dietr. 



On living leaves of black currant, Ribes nigrum L. 

 Agricultural Experiment station grounds. Geneva. September 26, 

 1906. F. C. Stewart. This is an injurious parasitic fungus which 

 has probably been recently introduced into this country. Its aecidial 

 form, P e r i d e r m i u m s t r o b i, occurs on the trunk and 

 branches of white pine to which it is more injurious than the 

 Cronartium is lo currant bushes. Fortunately this form has 

 not yet been detected in this country and it is possible that we may 

 yet be free from it. 



Diaporthe parasitica Murr. 



Parasitic on the branches of chestnut trees to which it is injurious 

 and eventually destructive. Various places in the vicinity of New 



I 



