92 v . 



Aecldium Sommerfeltii, Joh. 



NOTE. There are at least two species of AeciJium on species of Thalic- 

 trunt in North America; Aecidium Somtnerfeltii,]u\\. 1884 based on Cmoma 

 Thalictri, Sommf. 1826 and Aecidium Thalictri-flavi, Wint. based on 

 Aecidium Ranunculacearum, var. Thalictri-flavi, DC. 1815, from which 

 Aecidium Thalictri ,Grcv. 1823 appears not to differ. 



We use the name Aecidiu-n Sommerfeltii, Joh. for the species which occurs 

 on Thalictrum alpinum in Greenland and the northern and higher parts of 

 America and possibly on some other hosts. 



American mycologists have as a rule followed De Ton! who refers to Aecid- 

 ium Sommerfeltii all Aecidia on Thalictrum in Europe and North America, 

 but others have used the name Aecidium Thalictri in the sense in which we 

 here use the name Aecidium Thalictri-flavi. 



Of the Aecidia on Thalictrum Fendleri, referred variously to Aecidium 

 Sommerfeltii and Aecidium Thalictri, the specimens we have seen seem to be 

 Aecidium Thalictri-flavi ; but in some cases genuine Aecidium Sommerfeltii 

 appears to have been found on that host. 



According to Juel Oefv. K. Vet.-Akad. Foerh. 52: 383. 1885, Aecidium 

 Sommerfeltii is the Aecidium of Puccinia septentrionatis, Juel on Polygonum 

 viviparum. See also Syd. Mon. Ured. I : 575. 15 May 1903, Klebahn, 

 Rostpilze 321. 1904. 



On Thalietpum alpinum. 

 Rostr. Meddelelser om Groenl. 3 : 536. 1888. 

 De Toni in Sacc. Syll. 7 : 775- d. 28 Oct. 1888. 

 Rostr. Meddelelser om Groenl. 3 : 604. 1891. 



On Thalietpum Fendleri. 

 PCockerell, Zoe. 4 : 283. Oct. 1893. 

 Henn. Hedw. 37 : 272. 25 Oct. 1898. 

 Hume, Proc. Davenport Acad. 7 : 252. 12 May 1899. 

 Cockerell, Jour. Myc. 10: 51. 19 March 1904. 



Miscellanea. 



PHume, Proc. Davenport Acad. 7 : 252. 12 May 1899. T. sparsiflorum. 

 PBlasdale in Davy, Bull. U. S. Agr. PI. Industry 12 : 75. 1902. Aquilegia. 



Aecidium Sommepfeltii, Auct. Amer. p. p. 

 See Aecidium Thalictri-flavi, (D C.) Wint. 



Aecidium Sphseraleese, Ell. & Ev. 



NOTE. The species of Aecidium on Malvaceae, some of which were described 

 from dried specimens, appear to have been unduly multiplied. See Aeciiiium 

 Afalvastri, Ell. & Tracy, Aecidium intervtniens, (Pk.), Aecidium Napace, 

 Arth. & Holw. and Aecidium Callirrhoes, Ell. & Kellerm. See Arth. Bull. 

 Torr. Bot. Club 31 : 7. 19 Jan. 1904. See also Syd. Mon. Ured. 1 : 478. 

 15 May 1903. 



Ell. & Ev. Bull. Torr. Bot. Club 22 : 364. d. 31 Aug. 1895. 



Sacc. Hedw. 35 : xvii. 25 Feb. 1896. [Reportorium no. 7.] 

 *EI1. & Ev. N. A. F. 3345. Feb. 1896. 

 *E11. & Ev. Fung. Columb. 8ji. April 1896. 



Aecidium splendens, Wint. 



See Aecidium Crotonopsidis, Burrill. 



Aecidium Spraguese, Hark. 



NOTE. Described by the author as the secidial stage of Uromvces Spraguece, 

 Hark. 



