316 FUNGUS-FLORA. 



lets, that bear tlie imperfect, greenisli heads of conidia; 

 conidia globose, pale dingy green, 2 /x diameter. 



Botrytis vireUa, Fries, Summa. Teg. Sc, p. 491 ; Sacc, 

 SylL, n. 653. 



On xery vret and rotten wood. 



***** Brownish or darh- coloured, 



Botrytis Tilletii. Desm. 



Forming dense and often broadly effused, fawn-coloured or 

 brownish expansions ; sterile hyphae 8-10 fx 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 /x diameter. 



Botrytis Tilletii, Desm., Ann. Sci. Nat. (1838), toI. 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 //,, 

 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 

 arrano'ed in a racemose or corvmbose 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 



