90 



" Minute (1 line across), round, plano-convex. Perithecia small, 

 entirely hidden, connate, surface of the stroma roughened by the 

 ostiola, pruinose, sooty black. On rotten wood, Pennsylvania." 



Hypocrea Ravenelii, Berk. Grev. IV, p. 14, Rav. Car. V, 51, 

 Diatr //i><' lateritia, Ell. .Bull. Torr. Bot, Clu'b, IX, p. 19, "Hypoxylon 

 myriangioides, B. & C.," in Ell. N. A. F. 471, are all Melogramma 

 Hull in i'di. Tul. Roumeguere, in his Fungi Oallici, 1174, has isswd 

 the same thing as Hypoxylanfuscum (Pers.)- 



HYPOCRELLA, Sacc. 



Syll. II, p. 579- 



Stroma subcarnose, pulvinate, disciform or effused, bright colored 

 or dark. Perithecia more or less perfectly buried in the stroma. Asri 

 cylindrical, 8-spored. Sporidia filiform, nearly as long as the asri 

 hvquontly separating into short sections or joints. 



H. tuberiforniis. (B. & Rav.) 



Hypocrea tuberiformis, B. & Rav. Grev. IV, p. 13. 



Hypocrella tu bet- if or mis, Atkinson, Bot. Gaz. XVI, p. 282, pi. XXV, figs. 1-6. 



Stroma subglobose, 1 cm. or more diam., entire, lobed or divided, 

 fastened to the leaf bv a mycelium of whitish, radiating threads. At 



*/ / 



first thickly covered with erect, fertile hyphae 35-40 x 2-3 /*, bearing- 

 oval or broadly fusoid, inequilateral, hyaline, continuous conidia 7-10 x 

 3i_4 ^. When mature, a section shows three different colored strata : 

 the inner white, the intermediate one light ochre, and the outer one 

 cinnamon. Perithecia sessile, or only their rounded bases immersed. 

 subcylindrical, a little broader in the middle, cinnamon-color, 3-20 or 

 more together, 1 mm. long, \ mm. broad, frequently branched, the 

 bases of 2-3 joined, and the cavities confluent below. Asci very large. 

 450-750x14 /*, tapering to a slender point below, more gradually 

 towards the truncated apex. Sporidia linear, hyaline, pluriguttulate 

 and pluriseptate, rounded at the ends and separating at the septa. 



On Arundinaria, Carolina (Ravenel), Alabama (Atkinson). 



H. phyllogena, Mont. Syll. 711. 



Stroma pulvinate, hemispherical, base constricted and orange- 

 colored. Perithecia peripherical, erect, ovate and, with the punctiform 

 Mstiola, bright purple, sunk in the upper part of the stroma, which is 

 of the same color. Asci linear with the apex cap-shaped or obtusely 

 conical. Sporidia linear, curved, finally breaking up into segments 

 16-18x2 //. 



On living leaves of Centaurea speciosa, Cayenne, South America. 



We have included this species, which will, not improbably, yet be 

 found in Southern Florida or Mexico. 



