790 SPHiERIACEI. 



Sph. arf/ilJacca, Fr. S.1\T. \\.p. 333. Fr. Ohs. t. 2,/. 5. Carr. Linn. 

 Trans, xxii. t. 45,/. 35. 



On dead ash branches. 



2390. Hypoxylon fuscum. Fr. " Brown Ilypoxylon." 



Convex, pnlvinate, jHirplc-brown, or brown, at length naked, 

 black, black-brown within ; pcrithccia globose, ostiola umbili- 

 cate ; sporidia elliptical, or almond shaped, pale brown, then 

 very dark and opaque. — Fr. S.V.S.p. 384. Tul. Carp. \\.p. 39, t. 

 4,f.7-'[\. FcJcl. exs. 710. lOoA. Berk. Outl. p. 3S7. Sph. fusca^ 

 Fr. S.M. ii. p. 332. Encj. Fl. v. p. 237. Dill. Muse. t. 18,/. 7. 

 Wejg. t. 3,/. 2. Iledw. Ohs. t. 6. Todef. 100. Pers. Ann. t. 2,/ 3. 

 Nees. f. 310. Fries, exs. no. 42. Moug. exs. no. 178. Schn. exs. 

 no. 51. Tloffm. V.C. t. 5, f. 1. S. tuberculosa, Sow. t. 373, f. 9. 

 Bolt. t. 123,/ 1. Willd. Berl. 7, / 21. Bull. t. 468,/. 3. Curr. 

 Linn. Trans, xxii. t. 45,/ 38. 



On hawthorn, hazel, &c. Common. [United States.] 



At first clothed with a rusty or purple brown meal, gradually increasing 

 in thickness, at length naked, black, and pierced like a sieve. Sporidia 

 (•0005 in.) -0125 m.m. 



2391. Hypoxylon xubiginosum. Fr. " Eust-coloured 



Hypoxylon." 



Broadly effused, thin, pulverulent, bright rust-coloured ; peri- 

 thecia rather prominent; sporidia dark brown, elliptical, slightly 

 irregular, with one or more nuclei. — Fr. S.V.S.p. ^%4:. Fckl. 

 exs. no. 1051. Berh. Outl. p. 387. Sph. ruhiginosum, Fr. S.M.ii. 

 /). 340. Fries, exs. no. 14:2. Eng. Fl.'y.]^. 23d. Curr. Linn. Trans. 

 xxii. t. 45,/ 43. 



On decorticated trunks.- [Mid. Carolina.] 



Foi-ming longitudinally effused spots, 2-4 in. long, at first pulverulent and 

 dirty yellow, when full grown densely covered with rust- coloured powder, at 

 length naked and black ; perithecia small, umbilicate at the apex, almost 

 free. Sometimes the perithecia are solitary, larger, distant and papillary; 

 margin ha.YXQX\..— Fries. 



Sporidia (-0004 in.) "01 m.m. 



2392. Hypoxylon atropurpuireum. Fr. " Purple-black 



Hy[)Oxylon." 



Effused, thin, flattened, purplish-black ; perithecia connate, 

 rather prominent ; apex plane, papillate ; sporidia dark brown, 

 irregularly elliptical, with one or two nuclei. — S. atropurpurea^ 

 Fr. S.M. ii. p. 340. Fries, exs. no. 75. Eng. Fl. v. p. 239. Curr, 

 Linn. Trans, xxii. t. 45,/ 44. 



