751 



** Corticolce. 



1657. Sphceria albqfarcta, Schw. Scattered or gregarious. 

 Perithecia covered, very small, entirely immersed in the bark, white 

 inside, globose, horizontally striate, indistinctly ostiolate, the ostiola 

 visible through cracks in the bark which is blackened (bv the dis- 



o \ */ 



charged sporidia)? 



On young branches of Sassafras, which are extensively stained 

 and blackened, Bethlehem, Pa. 



1658. Sphceria tenella. Schw. Scattered, buried in the bark 

 under the epidermis. Perithecia minute, elliptic-oblong- or globose, 

 not glabrous. Ostiola very minute, visible through cracks in the 

 epidermis, apparently rising from a disk. Sometimes several ostiola 

 appear to rise from one perithecium. 



In the fibrous bark of Hibiscus roseus, Bethlehem, Pa. 



1659. Sph(t'i'i<i Daphnidis, Schw. At first covered, finally 

 bare above, but immersed in the bark. Perithecia globose-depressed, 

 dark brown, tomentose, immersed in a blackish, floccose crust. Ostiola 

 at first papillate, finally larger and deformed, especially in the denuded 

 perithecia which finally become rugose. Stains the bark black. 



On Daphnis Mezerei, Bethlehem, Pa. 



1660. Sphceria fuscescens, Schw. Aggregated or scattered, at 

 first entirely covered by the epidermis, but when this is thrown oft', 

 seated free on the surface of the inner bark. Perithecia minute, 

 ovate-conical, much wrinkled, black or dark brown, sometimes col- 

 lapsing, the papilliform ostiola visible through cracks in the epidermis. 

 The black, spermatic contents exuding stain the surface of the bark 

 around the ostiolum. 



On chestnut limbs. 



1661. Sphceria palliolata, Schw. Subseriate in cracks of the 

 epidermis, collected in small, elliptical groups, sometimes confluent. 

 At first covered by the epidermis, at length free, but always covered 

 by the thin, white inner membrane of the epidermis. Perithecia com- 

 paratively large, only a few in a cluster, globose-flattened, very black, 

 punctate-rugose. Ostiolum papilliform. 



On smooth branches of Rosa corymbosa. 



1662. Sphceria rhuina, Schw. Gregarious; extensively erum- 

 pent through the epidermis and closely surrounded by it. Perithecia 

 very black, flattened, with a central papilla through which the copious 



