﻿72 



(Macrosporium.) 



punctiforme, Berk. On dead stems of Rubus occi- 

 dentalis. Cincinnati.^ 

 Trichothecium. 



roseum, Lk. On dead Buttonwood, with Sphasria 

 convergens. March 19, 1842. 



OlDIUM. 



simile, Berk. On decayed wood. Cincinnati, Jan. 



18, 1842.' 



MORCHELLA. 



esculenta, Fers. Cincinnati. 

 Helvella. 



esculenta, Pers. Cincinnati. 

 Peziza. 



Acetabulum, L. On the ground. Cincinnati, Ap. 30, 

 1842.*^ 



pustullata, Pers. Cincinnati. 



aurantia, Pers. Cincinnati. 



occidentalis, Schwein. Cincinnati. 



floccosa, Schwein. Cincinnati. 



scutellata, L. Cincinnati. 



aerugiposa, PL Dan. Cincinnati. 



leucostigma, Pr. Cincinnati. 



citrina, Batsch. Cincinnati. 



culms and leaves on which it grows. Flocci erect, flexuous, septate; spores 

 brown, lanceolate, obtuse, transversely septate, with occasionally a vertical 

 septum; sometimes obovate-oblong. 



'■ Machospokium puNCTiroRME : soris minutis, sparsis, punctiformibus ; 

 sporis obovatis ; filis simplicibus, obtusis, subflexuosis. Berk, in Hook. Lond. 



Journ., vol. iv. p. 309, table xii. fig. 1. Forming minute, black, scattered 



dots ; stroma reticulate ; flocci erect, simple, slightly flexuous, sparingly sep- 

 tate, sometimes decumbent and then proliferous ; spores obovate, at first sim- 

 ple and pellucid, then furnished with one or two transverse septa, at length 

 acquiring a darker tinge and a few oblique or vertical septa. 



" OiDiuM simile: efFusum, submembranaceum,fulvum; filis ramosiusculis; 

 articulis ultimis subglobosiS. Berk, in Hook. Lond. Journ., vol. iv. p. 310, table 

 xii. fig. 4 Forming a deep, tawny, pulverulent, but somewhat membrana- 

 ceous stratum, which to the outward eye exactly resembles Oidium fulvum, 

 but distinguished by its subglobose, not oblong articulations. The fructifying 

 bodies arise, either from a direct transformation of the ultimate joints, or from 

 the central constriction of the subterminal. 



3 This species, it w\\\ be observed, retains its early appearance in 

 America. 



