ENDOTHIA PARASITICA AND RELATED SPECIES. 17 



Synonyms — Continued. 

 Perithecia — Continued. 



Sphaeria radicaUs Schw., 1832, Fun. Am. Bor., p. 197. 



SpJiaeria radicaUs Schw., Mont., 1834, in Ann. Sci. Nat. Bot., s. 2, t. 1, 



p. 295. 

 Sphaeria (Diatrype) radicaUs Fries, CuiTey, 1858, in Trans. Linn. Soc. 



London, v. 22, pt. 3, p. 272, pL 47, fig. 89. p. p. 

 Valsa radicaUs Ces. and De Not., 1863, in Comm. Soc. Crittog. Ital., v. 1, 



p. 207. 

 Endothia radicaUs (Schw.) Ces. and De Not., 1863, in Comm. Soc. Crittog. 



ItaL, V. 1, opp. p. 240. 

 Melogramma gyrosum L. R. and C. Tul., 1863, Selecta Fung. Carpol., t. 2, 



p. 87. p. p. max. 

 Sphaeria (Diatrype) radicaUs Schw., Currey, 1865, in Trans. Linn. Soc. 



London, v. 25, pt. 2, p. 244. 

 Endothia gyrosa (Schw.) Fckl., Sacc, 1882, Syll. Fung., v. 1, p. 601. p. p. 

 Endothia gyrosa var. rosteUata Sacc, 1882, Syll. Fung., v. 1, p. 602. 

 Endothia radicaUs (Schw.) Wint., 1887, Filze, p. 803. 



Endothia gyrosa Schw., Ell. and Ev.. 1892, No. Amer. Pyren., p. 552. p. p. 

 Endothia virginiana P. J. and H. W. And., 1912, in Phytopathology, v. 2, 



no. 6, p. 261. 

 Endothia gyrosa (Schw.) Fries, Clint., 1913, in Conn. Agr. Exp. Sta. Rpt., 



1911-12, p. 425. 

 Endothia psevdoradicaUs Petri. 1913. in Atti R. Accad. Lincei Rend. CI. 



Sci. Fis., Mat. e Nat, s. 5, v. 22. sem. 1, fasc. 9, p. 654. 

 Endothia gyrosa (Schw.) Fckl., Hohnel, 1913, in Sitzber. K. Akad. Wiss. 

 [Vienna], Math. Naturw. Kl., Abt. 1, Bd. 122, Heft 2, p. 298. 

 Type specimen. — Sowerby in Herb. Kew. on Castanea sativa, New Forest, 

 England. Coll. C. Lyell, Apr. 15, 1809. 



Pycnidia. — Stromata corticular or subcorticular, truncate conical to pulvi- 

 nate, usually separate and gregarious, but frequently confluent, 0.75 to 3 mm. 

 in diameter by 0.5 to 2.5 mm. high, compact, varying from light auburn to 

 chestnut on the surface and capucine yellow to cadmium orange within ; 

 pycnidia consisting of simple or more or less complex and irregular chambers 

 in the stroma, opening by an irregular pore or slit at the apex of the stroma ; 

 sporophores usually simple, sometimes branched near the base, cylindric to 

 subclavate, 10 to 13 fi long, sometimes 24 to 30 ; pycnospores oblong to rod- 

 like, pale yellowish in mass, 3 to 5 by 1.5 to^2 fi, mostly 3.5 to 4 by 2 ix. 



Peeithecia. — Stromata the same or similar to those producing pycnidia ; 

 perithecia membranous, few to many, mostly 15 to 25. 300 to 400 fi in diameter, 

 usually arising in the lower portion of the stroma, irregularly arranged in one 

 to three layers, prolonged into slender necks which penetrate the stroma above 

 and protrude usually from 300 to 600 fi, terminating in conical ostioles ; asci 

 oblong fusoid or subclavate, very short stipitate, 30 to 40 by 6 to 8 /a, mostly 

 30 to 35 by 7 n, ascospores irregularly biseriate, oblong fusoid or subellipsoid, 

 not constricted at the septum, hyaline with a thin gelatinous envelope, 6 to 10 

 by 3 to 4.5 fi, mostly 6.5 to 9 by 3 to 4 /j.. 



Cultural chaeactees. — Cultures one month old on white corn meal show a 

 compact growth with a nearly smooth surface. The color ranges from light 

 cadmium to empire yellow, and the medium becomes perilla purple. Pycnidia 

 and spores usually appear a little later, forming large erumpent stromata 

 which extrude thick masses of pycnospores. The light mycelium with large 

 43737°— Bull. 380—17 2 



