333 



This aecidium on Melampyrum included here is known on this host 

 otherwise only from Connecticut and Massachusetts. It somewhat re- 

 sembles A. Melampyri Kuntze & Schum., which has been shown by Juel 

 (Obv. K. Vet. Akad. Foch 1894. 503) and Klebahn (Kulturv. VIII 402) 

 to go to Puccinia ife7noralis Juel on Molina caerulea. The American 

 aecia differs however from the European in the larger thick walled 

 aeciospores and in the character of the peridial cells and since no telial 

 form referrable to the European species has yet been found in America 

 it is probable that the Aecidium under discussion goes to some American 

 grass or sedge rust. It is scarcely distinguishable from the aecia of 

 P. AndroiJogonis Schw. which occur on other Scrophulariaceae in the 

 same range and is tentatively referred here till positive cultures are 

 conducted. 



38. Puccinia ANGUSTATA Pk. Bull. Buff. Soc. Nat. Hist. 1:67. 1873. 

 Aecidium lycopi Ger. ; in Peck Bull. Buff. Soc. Nat. Hist. 1:68. 1873. 

 On Boraginaceae : I. 



Lycopus virginicus L., Newark, May 25, 1908, (2236), Seaford, 

 June 4, 1908, (2068). 

 On Cyperaceae: II, III. 



Scirpus atrovirens Muhl. Newark, Oct. 4, 1905, (1635). 

 Scirpus cyperinus (L.) Kunth., Selbyville, October 4, 1907, 



(1812). 

 Scirpus georgianus Harper, Newark, September 1907, (1818, 

 1820). 

 This species has for its aecial stage Aecidium lycopi Ger. on Lycopus 

 sp. as first shown by Arthur in 1899 (Bot. Gaz. 29:273. 1900), who 

 succeeded in infecting Scirjms atrovirens with aeciospores from Lycojjus 

 americanus. These results were confirmed in 1901, 1903, 1904, 1906 and 

 1907 (Jour. Myc. 8:53. 1902; 11:58. 1905; 13:196. 1907; 14:14. 1908) 

 by sowing teliospores from Scirpus atrovirens on leaves of Lycopus 

 americanus resulting in each case in the development of aecia. Keller- 

 man in 1903 (Jour. Myc. 9:226. 1903) confirms Arthur's results using 

 the same hosts, collecting his telial material in Ohio. In 1908 (Mycol. 

 1:234. 1909) Arthur infected Lycopus communis and L. americanus by 

 sowing with teliospores from Scirpus cyperinus. In 1910 (Mycol. 4:17. 

 1912) the results of 1901-1907 were confirmed and in 1911 (Mycol. 4:54. 



