504 Kern : Studies in the genus Gymnosporangium 



7 a nd 14, 1896, Undenvood & Earle ; Daytona, Florida, 



February, 1887, communicated by Dr. Roland Thaxter ; Colum- 



March 



M 



mnosp 



Ju nip 



in the shape of the spore-masses and galls. The spore-masses 

 are darker, shorter, and more conical, while the galls have a 

 peculiar brownish luster. Cultures have been made by Dr Ro- 

 land Thaxter at Cambridge, Mass., and by Prof. F. S. Earle at 

 Auburn, Ala., establishing the connection between this and the 

 roestelial form on Crataegus spathulata* As a further character- 

 istic, Dr. Thaxter has pointed out in a letter to the writer that it 

 takes this species longer to mature its roestelial form than any 

 other species known to him. The telial stage was fairly well 

 characterized by Underwood and Earle (Bot. Gaz. 27 : 25 )i 

 1896, but no name was employed. In the following year 

 same authors, in Bull. 80 of the Alabama Experiment Station, R 

 218, applied the name Roestelia flavsfarffds without any acco 

 panying description, to the stage on Crataegus spathulata, a 1^ 

 Atkinson as an authority. Later, when cultures had proven ^ 

 connection between the new Gymnosporangium on cedar an 

 Roestelia on Crataegus spatkulata, the combination °^ m °J^ 

 rangium flaviforme (Atks.) Earle was made by Earle, Uk. a m w^ 

 out a description. The name flaviformis was a misinterpre^ At _ 

 oifloriformis, a herbarium name attached by Thaxter in ^ ^ 

 kinson herbarium. f After consulting with Dr. ThaXt ^-^. ;//t , 

 decided as preferable to take up the original name Jton^ ^ 

 Having furnished notes and specimens and being the au 

 the name he is cited as the authority. 



_ . n T 7 



(Jacq.) 





1805 



This is the 



1 Furop eal1 

 mis is tne most widely distributed of the three ^ ^ 



species found in North America, reaching from the i an^ ^ 

 into the heart of the Rocky Mountains. The roestehaj * 



*See Earle, Cor.tr. V. S. Herb. 6 : 186. 1901- . ., ■ lis given be 



t Farl. Bibl. Index 1 : 44. 1905. " The name Roestelia fiav^ ^ ^ c]l „< 



low is a misprint for Roestelia flori/or mis, Tliaxter in Herb. g^t. 



description has been published. See Gymnosporangium flaviforme 



