641 



Perithecia subglobose, monostichous, large (1mm.), from J-J of the 

 upper part free, finally annulate-truncate above, with the black, papil- 

 liform ostiolum in the center of the truncate disk. Asci narrow- 

 cylindrical, (p. sp.) 75 x 6 fj. or, including the slender base, 100-112 p 

 long. Sporidia oblong-navicular, uniseriate, brown, mostly 2-nucleate, 

 7-9 x 3J //, with their extremities rather more obtuse than in the pre- 

 ceding species. Var. b. depressa, Fr. 1. c., appears to be the effused 

 form above mentioned. This species is not mentioned in Schw. Syn. 

 N. Am. It is readily distinguished from H. marginatum by its larger 

 perithecia, much more prominent and sometimes nearly free, and its 

 smaller, purplish-black stromata. No. 182 in Rav. F. Am. (in the 

 copies we have seen) is H. marginatum. 



On dead limbs, an;! having about the same range as the preceding 

 vspecies. 



The conidial stage is Verticillium puniceum, C. & E. Grev, 

 XVIII, p. 68. Tufts scarlet, elliptical, pulvinate, often confluent in 

 patches 1 cm. in extent. Hyphae slender, branching, septate; branches 

 verticillate, short, tinged with rose-color. Conidia elliptical, minute, 

 continuous, profuse, hyaline, 4x2 p.. The perithecia appear in the 

 midst of these conidial tufts, and are at first covered by them. 



* 

 i 



H. obesum, Fr. Nova Symb. p. 129. 



Hard-carbonaceous, bare, black. Stronia slightly exceeding the 

 short, very thick stipe, of radiate structure and cinereous-black within. 

 Perithecia immersed, peripherical. bullate-prominent. Ostiola papil- 

 late,, surrounded by an elevated, orbicular margin. Fries, who de- 

 scribed this species from a single specimen, says it is allied to H, 

 annulatnm, that it is very hard, an inch high and. at least when 

 mature, quite bare, glabrous and shining black. The sterile base or 

 stipe is ^ an inch high, ruirose outside and attenuated below, covered 

 above with a horizontal, slightly convex layer of globose, immersed, 

 monostichous, bullate-prominent perithecia, like an immarginate pileus 

 an inch across. The bullate projections of the perithecia are sur- 

 rounded with a prominent orbicular margin, and in the middle of this 

 circular area emerge the papilliform ostiola. The specimen seen by 

 Fries was old and entirely without sporidia. 



On trunks, in Costa Rica (Oersted). 



H. Sassafras, (Schw.) 



Sphtzria Sassafras, Schw. Syn . Car. No. 87. 

 Hypoxylon Sassafras, Berk. Grev. iy, p. 54. 

 Exsicc. EH. N. A. F. 473. Rav. F. Am. 345. Rav. F. Car. I, No. 53. Rab. F. E. 3459. 



Perithecia large (1 J mm.), the internal cavity nearly 1 mm. diam. 



81 



