818 



SPHvERTACEl. 



Gen. 350. MELANCONZS, Tul. 



Stroma regnlnr, orbicular or ovate, 

 conical or pulvinate ; conidia simple or 

 multilocular, often oozing out in a black 

 mass ; spermatia shortly filiform, curved. 

 Perithecia globose, semi-immersed, with, 

 short necks, circinating ; sporidia two, 

 Fig. 086. or many celled, hyaline or coloured. — 



Tul. Carp. i\.p. 115. {Figs. 386, 387.) 



2454. IVIelanconis stilbostoma. 



Tul. " Birch Melanconis." 



Conidia. — Stroma elevated, 

 prominent, white ; conidia com- 

 pact, subglobose, olive, or olive- 

 brown. — Melanconium hicolor, Nees. 

 f. 27. Corda. i. /. 33, 34. Fckl. 

 exs.710.84:. Rahh.exs. no. 590. 3f. 

 hetulinum, Sclim. ^ Kze. exs. no. 

 208. Fckl. exs. no. 85. Moug. exs. 

 no. 670. Fries, exs. no. 299. M. 

 elevatum, Corda. iii. /. 60. Didy- 

 Fig. 387. mosporium elevatum, Lk. Sp. vi. p. 



94. Fr. S.M. iii.p. 486. D. hetulinum, Grev. t. 273. (Fig. 386.) 

 Spermogonia. — Nucleus pallid ; spermatia at length curved, 

 very slender, orange. — Nemaspora crocea, Fries, exs. no. 107. 

 Nemaspora aurea, Rahh. exs. no. 584. Lihertella hetulina, Desm. 

 Ann. Sc. Nat. xix. f 1830), t. b,f. 4. 



AscopHORE. — Perithecia in circles, covered with a waxy dirty- 

 white disc ; ostiola prominent, scattered, bursting forth, and at 

 length obliterating the disc ; sporidia biseriate, colourless, acu- 

 minate-elliptic, constricted, endochrome bipartite. — Tul. Carp. ii. 

 p. 120, 1. 14,/. 1-12. Fckl. exs. no. 590. Sphceria stilbostoma (in 

 part). Fr. S.M. 'li.p. 403. Fr. exs. no. 145. Curr. Linn. Trans, xxii. 

 t. 48, /: 140. Desm. exs. no. Ihl. Moug. exs. no. 962. {Fig. 387.) 

 On birch. [United States.] 



2455. 



Melanconis alni. Tul. " Alder Melanconis.'- 



Conidia. — Stroma elevated, latent; conidia compact, globose, 

 or subglobose, very small, pelucid. — Melanconium sphceroideum^ 



