1893.] NATURAL SCIENCES OF PHILADELPHIA. 169 



Botrytis affinis E. & E. 



On decorticated wood of a decaying, white ash log, London, 

 Canada. Nov., 1892. (Dearness, No. 2,073.) 



Forms a thin olive-black velvet-like coating on tbe surface of tbe 

 wood. Hypbre erect, brownish-olive, sparingly and obscurely septate, 

 more or less minutely muriculate-roughened, about 4// diam., sub- 

 dichotomously branched, the branches near the summit mostly 

 opposite, short (12-15,u), erect, slightly swollen and roughened at 

 their tips where are attached in loose clusters the olive-brown, 

 globose or elliptical conidia which are 4-5,". in their longer 

 diameter. 



Scarcely distinguishable externally from B. juliginosa C. & E., 

 but the mode of branching is different and the conidia larger. 



Ramularia lethalis E. & E. 



On living leaves of Acer rubriim, London, Canada. June, 1890. 

 (Dearness, No. 1,730). Sent also from Michigan by G. H. Hick6. 



Hypophyllous, forming at first small, irregular shaped, lead- 

 colored patches along the midrib and nerves, generally toward the 

 apex of the leaf, which soon turns black in these affected spots and 

 soon spreads over the upper half of the leaf which then becomes black 

 and dead, and soon crumbles away. The blackened areas enclose 

 paler, whitish spots. Hyphse subfasciculate, simple, continuous, 

 hyaline, 10-15x12-2//., bearing at their tips the subcatenulate, 

 oblong, hyaline continuous, 5-10 x 2-2?/^ conidia. 



The fungus is very destructive to the leaves. 

 Clasterisporium pulchrum E. & E. 



On bark of dead Carpinus americana, London, Canada. June, 

 1892. (Dearness, No. 1,900.) 



Effused, velvety, black. Creeping hyphse, septate, branched, 

 interwoven, with here and there tufts of paler, straight, erect-spread- 

 ing lance-shaped hyphae arising from a membranaceous, perithecium- 

 like base. Conidia clavate, mostly a little curved, truncate or 3-4- 

 cleft at the apex, 7-9-septate, the upper cell paler and armed with 

 about 4 lateral boss-like tubercles or short horns. The whole prob- 

 ably forms the conidial stage of some Pyrenomycete, of the family 

 La$ios})hcerie(B. 



Dendryphium sphaerioides E. & E. 



On Bigelovia douglasii, Sprucemont, Nevada. Oct., 31, 1892. 

 (M. E. Jones, No. 6.) 



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