204 BROOKLYN BOTANIC GARDEN MEMOIRS 



Solidago caurina Piper- — North slope Mt. Hood, Aug. 7, 1914, 

 1605. 



Solidago elongata Nutt.— Corvallis, July 29, 1915, 3244; Scotts, 

 7 miles N. of Fort Klamath, Klamath Co., Sept. 20, 1913, E. P, 

 Meinecke, Cr D 7. 



Solidago missouriensis Gray?^ — Sumpter, Baker Co., Aug. 21, 1915, 

 J. R. Weir, 267. 



Solidago tolmieana Gray? — Hood River, July 23, 1915, 3254. 



The life history of this species was first demonstrated by Clinton 

 (Science N. S. 25: 289. 1907; Ann. Rep. Conn. Exp. Sta. 1906: 

 320. 1907; 1907: 375. 1908). He successfully infected Solidago 

 rugosa with aeciospores of Peridermium acicolum on Pinus rigida. 



The single collection of aecia listed above (1610) agrees with 

 the description of P. montamim Arth. & Kern and was collected in the 

 immediate vicinity of Solidago caurina (1605). The possibility of 

 genetic relationship was made note of at that time. Hedgcock 

 (Mycologia 4: 144. 1912; Phytopath. 3: 16. 1913) has also made 

 similar observations and more recently (Phytopath. 6: 65. 1916) 

 has cultured this Peridermium successfully on Aster conspicuus , using 

 aecial material on Pinus contorta collected in Montana. Weir and 

 Hubert (Phytopath. 6: 68. 1916) working independently from Hedg- 

 cock, with similar aecial material, have also demonstrated by cultures 

 that this Peridermium has its uredinia on both Aster and Solidago, 

 having obtained infection on A. laevis geyeri, S. canadensis and S. 

 missouriensis. 



Sydow (Monographia Ured. 3: 621. 1915) suggests that the form 

 on Aster in North America is different from C. Solidaginis on Solidago 

 and should either be united with the Asiatic C. Asterum (Diet.) Syd. 

 or that it represents an unrecognized species having a different Peri- 

 dermium as its aecial form. The culture work of Weir and Hubert 

 (1. c), however, shows that P. montamim is genetically connected with 

 uredinia on both Aster and Solidago and does not lend support to 

 Sydow's view. 



While the two species of Peridermium included here are widely 

 separated as to range and are morphologically distinguishable, it 

 seems best until further culture work is conducted to recognize but 

 one American species. 



UREDINACEAE 



5. Calyptospora columnaris (Alb. & Schw.) Kuhn; Rab.-Wint. 

 Fungi Eur. 3521. 1886. (Hedwigia 26: 28. 1887.) 

 Aecidium columnare Alb. & Schw. Consp. Fung. 121. 1805. 

 Calyptospora Geoppertiana Kuhn, Hedwigia 8:81. 1869. 



