316 FUNGUS-FLORA. 



lets, that bear the imperfect, greenish heads of conidia; 

 conidia globose, pale dingy green, 2 n diameter. 



Botrytis virella, Fries, Summa. Veg. Sc., p. 491 ; Sacc., 

 Sjll., n. 653. 



On very wet and rotten wood. 



***** Broicnish or dark-coloured, 



Botrytis Tilletii. Desm. 



Forming dense and often broadly effused, fawn-coloured or 

 brownish expansions; sterile hyphae 8-10 p. thick, septate, 

 branched, interwoven ; fertile, same thickness, short, erect, 

 irregularly or imperfectly verticillately branched near the 

 apex, tips of the branchlets spinulose and bearing numerous 

 elliptical or subglobose conidia, 4 x 3 or 4 p. diameter. 



Botrytis Tilletii, Desm., Ann. Sci. Nat. (1838), vol. x. 

 p. 308 ; Sacc., Syll., n. 660. 



Running over moss, leaves, wood, &c. 



Botrytis croci. Cke. & Mass. 



Small dark smoky tufts, sometimes confluent and effused ; 

 threads thick, rather closely septate, slightly branched at 

 the attenuated tip.^, pale olive below, colourless above ; 

 conidia elliptical, continuous, hyaline, 15-18 x 8-10 /x, 

 collected at the tips of the branches in small heads of from 

 3-8 conidia. 

 ^ Botrytis croci, Cke. & Mass., Grev., xvi. p. 10. 



On dead leaves of Crocus. 



B. Polyactis. Link. 



Large, rather rigid, forming brownish-grey tufts ; branches 

 thickish, obtuse, usually with scattered tooth-like projections 

 arranged in_a racemose or corymbose manner, and bearing 

 the conidia. 



Botrytis vulgaris. Fr. 



Tufts greyish-olive, scattered ; often becoming confluent, 

 fertile hyphae septate, ascending or erect, olive, branched 

 near the tip ; primary branches short, spreading, bearing a 

 few short branchlets usually arranged in pairs; conidia 



