262 



Arthpomitus, Leidy. 

 Leidy, Proc. Phil. Acad. 4: 227. d. 9 Oct. 1849 and 5 : 36. 30 April 



1850. 

 Leidy, Smithsonian Contrib. 5 2 : 33. d. 34. April 1853. 



Arthromitus cpistatus, Leidy. 

 Leidy, Proc. Phil. Acad. 4 : 227 d. 9 Oct. 1849. 



Leidy, Smithsonian Contrib. 5 2 : 34. d. pi. 2, f. /*'. pi. 5,/. 3 d , 14 '"> 

 pi. 6,f. s e . pi. S,f. if, 2J, 3,4, 5- April 1853. 

 Arthromitus nitidus, Leidy. 

 Leidy, Proc. Phil. Acad. 5 : 35. d. 30 April 1850. 



Apthpomitus nitidus, Leidy. 



See Arthromitus cristatus, Leidy. 



Apthpospopium eompositum, Ell. 

 *E11. N. A. F. 41$. 1880. 



Ell. Bull. Torr.'Bot. Club 8 : 64. d. June 1881. 



Sacc. Syll. 4 : 598. d. 10 April 1886. 



Ell. in Cat. PI. N. J. 573- 1889. 



Morg. Bot. Gaz. 15 : 85. April 1890. 

 *Barthol., Ell. & Ev. Fung. Columb. 171 1. Feb. 1903. 

 Arthrobotryum eompositum, Pound & Clements. 



Pound & Clements, Minn. Bot. Studies 9 : 728. 31 May 1897. 



Aptocpeas Miehenepi, B. & O 



See Aleurodiscus Micheneri K (B. & C.) Massee. 



APtotPOgus, Mont. 



Note. We here refer the species of Artotrogus to Pythium, Pringsh. for 

 the reason that by any other course we should increase bibliographical diffi- 

 culties already very great. The original Artotrogus of Montagne in B. Jour. 

 Hort. Soc. London 1 : 33. pi. 4, f. 27-29. 1846 and Gard. Chron. 1845 : 

 640. 20 Sept. 1845 was verv vaguely described and even with the more 

 detailed information given by DeBary who examined Montagne's material 

 one is not able to say with certainty what the type species, Artotrogus hydnos- 

 porus, Mont, really was. 



Otto Kuntze in Rev. Gen. PI. 3 2 : 443. 1898 refers to Artotrogus, Fr. 

 S. O. V. 497. 1825. Fries was not the author of the genus. The citation 

 in Kuntze is an error and should have been Fries, Surama Veg. Scand. 497. 

 1849 in which place Fries refers to Montagne as the author of the genus 

 adding a second species now known to be the conidial form of A T yctalis lyco- 

 perdoides, (Bull.) Schrt. 



Pythium as denned by Pringsheim is a genus whose characters are sufficiently 

 well recognized at the present day and the genus is adopted by nearly all 

 modern writers. The intricacies of the synonymy of the genus Pythium as 

 used by writers previous to Pringsheim are so great that it would be a fruit- 

 less labor to attempt to straighten them out and it seems to be the part of 

 wisdom to retain the Pythium of Pringsheim which has been in general use 

 since 1858. 



Artotpogus DeBapyanus, Atk. 



See Pythium DeBaryanum, Hesse. 



Artotrogus intepmedius, Atk. 



See Pythium intermedium, D By. 



APtotPOgus, sp. indet. 



See Pythium. sp. indet. 



Asehersonia, Mont. 



Note. For note on the validity of the genus Asehersonia see Hennings, 

 1904. 

 Henn. Festschrift Ascherson 71, 72. 1904. 



