262 



Arthromitus, Leidy. 

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



1650. 



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

 Arthpomitus cristatus, Leidy. 

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

 Leidy, Smithsonian Contrib. 6 2 : 34. d. pi. 2, f. /'. pi. $,/. 3*, /./ /s. 



pi. 6,f.$'. pi. 8,f. //, 2<*, j,4, 5. April 1853. 

 Arthromitus nitldus, Leidy. 

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

 Arthromltus nitidus, Leidy. 



See Arthromitus cristatus, Leidy. 



Arthrosporium compositum, Ell. 

 Ell. N. A. F. 411. 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. 



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

 *Barthol., Ell. & Ev. Fung. Columb. 1711. Feb. 1903. 

 Arthrobotryum compositum, Pound & Clements. 



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



Artoereas Mieheneri, B. & C. 



See Aleurodlscus Mieheneri, (B. & C.) Massee. 



ArtotPOgus, 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 i : 33. pi. 4, f. 27-29. 1846 and Card. Chron. 1845 : 

 640. 20 Sept. 1845 was ver y 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, Summa Veg. Scand. 497. 

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

 adding a second species now known to be the conidial form of Nyctalis lyco- 

 perdoides, (Bull.) Schrt. 



Pythium as defined 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. 



AptotPOgus DeBaryanus, Atk. 



See Pythium DeBary anum, Hesse. 



AptotPOgus intermedius, Atk. 



See Pythium intermedium, D By. 



Aptotrogus, sp. indet. 



See Pythium, sp. indet. 



Aschepsonia, Mont. 



NOTE. For note on the validity of the genus Aschcrsonia see Hennings, 

 1904. 



Henn. Festschrift Ascherson 71, 72. 1904. 



