21 



I5 BOTANICAL GAZETTE [January 



this species, and a large proportion of much smaller spores, 

 which were surmised to belong to Pucci?iia Peckii. Sowings 

 were made, May 5, on Sambucus canadensis and Onagra bie?inis. 

 May 10, abundant spermogonia appeared on Onagra, followed 

 May 16 by aecidia. On Sambucus spermogonia appeared spar- 

 ingly May 13, followed by aecidia May 21. The sedge, there- 

 fore, bore two species of rust in 1901, intermixed on the same 

 leaves. In addition to this, on May 19, aecidiospores from 

 Sambucus canadensis were sown on Carex trichocarpa, which gave 

 rise to uredo on May 27. The connection of Puccinia Bolleyana 

 with Aecidium Sambuci appears to be proven beyond question. 



Two collections of Puccinia Atkinsoniana on Carex lurida 

 Wahl. were sent from Columbus, Ohio, by Professor Kellerman, 

 with the suggestion, which seemed to me at the time very 

 improbable, that the aecidia doubtless occurred on Sambucus 

 ca?iade?isis. Another collection was secured from the vicinity of 

 Lafayette, Indiana. Two sowings were made on Onagra biefinis 

 without infection. One sowing from each of the three collec- 

 tions was made on Sambucus canadc?isis with abundant success in 

 each case. The dates are respectively April 28, May 7 and 16; 

 April 29, May 5 and 16; and May 7, 12, and 21. Professor 

 Kellerman has written me that his cultures also gave similar 

 results. 



These discoveries led to a careful microscopic study of the 

 two Carex rusts, and there appears to be no reason to ques- 

 tion that P. Atkinso7iiana and P. Bolleyana are identical. In the 

 designation of the species it seems necessary on grounds of 

 priority to abandon both these names, however, and it becomes 

 Puccinia Sambuci (Schw.), nom. nov. 



5. Puccinia Caricis-Asteris Arth. A collection of this 

 species on Carex foe ?ie a Willd. was sown on Solidago serotina, with 

 no infection. It was also sown, May 2, on Aster pa?iiculatus Lam., 

 and was followed by spermogonia May 8, and aecidia May 19, 

 thus confirming the writer's previous work. 8 



6. Puccinia Caricis-Erigerontis Arth. A collection of this 

 rust on Carex festucacea Willd. was used for cultures on Erigeron 



8 Jour. Mycology 8: 54. 1902. 



