SPH^RIACEl. 823 



AscoPHORE. — Somewhat conic ; stroma cortical, contained in 

 a close dimidiate conceptaculum ; disc truncate, white, perforated 

 by the black poriform ostiola ; asci oblong, sessile ; sporidia cy- 

 lindrical, curved, simple, hyaline. — Fr. S.V.S.p. 411. FcJcl. exs. 

 no. 603. Valsa Persoonii, Nke. Pyr. Germ. \. p. 222. ^S*. leucos- 

 toma, Fr. S.M. ii.p. 387. Fries, exs. no. 258. Nees.f. 332. Moug. 

 exs.no. 659. Eng.Fl.Y. p. 2-48. Tode. f.^Q. Berk. exs. no. 31. 



On branches of Prunus. Common. [United States.] 



At first resembling a Cytispora, witli 1-2 black included ostiola, bnt when 

 perfect bearing many minute exserted. now and then slightly prominent os- 

 tiola. It differs from V. nivea in the nature of the disc, the obliterated stroma, 

 and the more adnate conceptaculum. — Fries. 



2465. Valsa Kunzei. Fr. " Kunze's Larch Yalsella." 



Spermogoxia. — Cytispora sp.Fchl. Syin. Mycp. 201. 



AscoPHORE. — Conical ; stroma pallid — yellow ; disc waxy, 

 din,s:y, at first pierced with a pore, then the small black ostiola, 

 umbilicate ; asci elliptical ; sporidia biseriate, almost colourless, 

 curved. — Sph. Kunzei, Fr. Kze. M.H. ii. p. 45. B. ^' Br. Ann. 

 N.H. no. 601. C^irr. Linn. Trans. :s.x.ii. t.4:8,J. 133. Fckl. exs. no. 

 1728. 



On fallen branches of larch. 



Orbicular, prominent ; disc erumpent, truncate, dingy cinereous or oliva- 

 ceous, conceptaculum scarcely a line broad, scutelliform, black, adnate to 

 the inner bark; perithecia minute, numerous, crowded. Sporidia ('OOOiin.) 

 '01 m.m. long. 



. 2466. Valsa microstoma. Fr. " Small-mouthed Yalsella." 



Spermogonia. — Spermatia cylindrical, curved, minute. — Cy- 

 tispora sp. Fckl. Sym. Mycp. 199. 



AscoPHORE. — Orbicular, subimmersed; disc prominent, nearly 

 plane ; ostiola very minute, globose, covered ; sporidia biseriate, 

 colourless, transparent, curved, obtuse. — Fr. S. V.S.p. 41] . Curr. 

 Linn. Trans, xxii. t. 47, /. 130. Sph. microstoma, Fries, exs. no. 

 185. Berh. Mag. Zool. ^' Bot. no. 20. Fr. S.M. ii. p. 388. Nees. 

 f. 331. Fdd. exs.no. 1972. 



On dead sloe. 



Sporidia (.OOOo-'OOOZ in.) •0127-'0ir7 m.m long. 



2467. Valsa dissepta. Fr. " Variable Elm Valsella." 



Spermogonia. — Spermatia almost linear, on branched septate 

 threads. 



