Arthur: Cultures of Uredineae in 191 i 



57 



10. Gymnosporangium inconspicuum Kern, on Juniperus 

 utahensis (Engelm.) Lemmon, sent by Mr. E. Bethel from 

 Paonia, Colo., was sown April 7 on leaves of Amelanchier erecta 

 and of A. vulgaris^ with infection only on the latter, showing 

 pycnia April 24, but not maturing aecia.^* 



11. Gymnosporangium Libocedri (P, Henn.) Kern, on Libo- 

 cedrus decurrens Torr., sent by an unknown correspondent, was 

 sown April 17 on Amelanchier vulgaris, Crataegus tomentosa, C. 

 cerronis, and Sorbus aucuparia, with no infection on the last, but 

 pycnia showing on the other hosts April 25, 26 and 28 respec- 

 tively, and abundant aecia on the Amelanchier , showing May 16}^ 



12. Gymnosporangium juniperinum (L.) Mart., on Junip- 

 erus sibirica Burgsd., sent by Mr. E. Bethel from Palmer Lake, 

 Colo., was sown April 26 on Sorbus aucuparia, without producing 

 infection. It was again sown May 5 on 5^. americana, and pro- 

 duced pycnia May 20 in abundance, but did not develop aecia. 



The species has not been cultivated before from American 

 material. The first cultures were made in Europe by Robert 

 Hartig^^' about 1882 at Munich, and the species named G. tremel- 

 loides, from its conspicuous telia. The Linnaean name appears 

 to have been transferred by Oersted in 1866 to a much less con- 

 spicuous form, as pointed out by Kern,^' but it seems best now to 

 follow the original usage. The galls used in the present culture 

 were on small branches and about one centimeter across. 



13. Coleosporium Vernoniae B. & C. A collection of Per- 

 idermium carneum Bosc, on Pinus taeda L., collected by Mr. 

 Ray Stretch and the writer at Mississippi City, Miss., was sown 

 March 6 on Laciniaria scariosa and Vernonia gigantea, with in- 

 fection only on the latter, uredinia showing March 22. Three 

 other collections on Pinus taeda L., made by the same persons at 

 Biloxi, Miss., were each sown March 8 on- Laciniaria scariosa and 

 L. punctata, with no infection. The results confirm the work 

 of 1910.^^ 



For previous cultures on fruit of Amelanchier see Jour. Myc. 14: 24. 



1908. 



For previous cultures see Mycol. i : 252. 1909. 

 ^''Hartig, Lehrb. Baum-Kr. 133. 1882. 



"Science 27: 930. 1908; Bull. Torrey Club 35: 499. 1908; and Bull. N. Y. 

 Bot. Gard. 7: 458. 191 1. 



See Mycol. 4 : 29. 1912. 



