BOTRYTIS. 



[ 97 J 



BOTRYTIS. 



BOTRYTIS, Mich. A genus of Mucorini 

 (Hyphomycetous Fungi), among which are 

 found some of the commonest moulds of de- 

 caying vegetable substances, and some very 

 important parasitic fungi. Corda separated 

 the species with the filaments continuous in- 

 to a genus called Pcronospora (fig. 79), from 



Fig. 79. 



Fig. 80. 



Botrytis (Peronospora). 

 Magnified 200 diameters. 



Botrytis. 

 Magnified 200 diameters. 



those with articulate filaments (fig. 80). The 

 Potato-fungus, and the Muscardine of silk- 

 worms, are species of Botrytis, as described 

 below ; their natural history is further treated 

 of under the head of PARASITIC FUNGI. 

 The following have been described as British 

 species, but some appear referable to other 

 genera : 



1 . B. ( Peronospora, Unger, Haplaria, Lk. ) 

 grisea, Fr . Fertile filaments simpl e or forked, 

 gray, slender, rather rigid, septate, with little 

 heaps of globose gray spores at the apices 

 and sides. On decaying vegetables, usually 

 on Sparganium and allied plants. Corda, 

 Icon. Fung. i. pi. 4. fig. 246. 



2. B. cinerea, Pers. Fertile filaments gre- 

 garious, almost simple, cinereous, soon stran- 

 gulated, with white spores attached here and 

 there. Not uncommon on stems of herba- 

 ceous plants. 



3. B. cana, Schmidt. Fertile filaments cine- 

 reous or whitish, branched at the apex : spores 

 large, oval. On rotting stems and leaves. 

 Mucor racemosus, Bulliard, t. 504. fig. 7- 



4. B. vulgaris, Fr. Fertile filaments gray, 

 divided at the apex into lobe-like branches, 

 on w r hich are collected the globose minute 

 spores. Common on rotting plants. B. aci- 

 norum, Pers. Fresenius, Beitr. z. Mycologie, 

 i. pi. 2. (?) Polyactis vulgaris, Nees, Syst. 

 fig. 57. 



5. B. vera, Fr. Fertile filaments gray, 

 branched above, forming spikes about the 



slender apices. On decaying substances, 

 fungi, &c. Mucor Botrytis, Bolton, pi. 132. 

 fig. 3. 



6. B.crustosa,Fr. Fertile filaments white, 

 simple, trifid and verticillate ; spores globose, 

 terminal. On stems and leaves. 



7. B.parasitica, Pers. Fertile filaments 

 white; branches ramulose; spores very large, 

 globose. On Cruciferae (turnips, cabbages, 

 &c.). Berkeley, Journ. Hort. Soc. i. pi. 4. 

 fig. 26; Corda, Icon. Fung. v. pi. 2. fig. 18. 

 Mucor Botrytis, Sowerby, pi. 359. 



8. B. effusa, Greville. Fertile filaments 

 purplish-gray, branched above; branches 

 short, divaricate; spores large, oval. Fre- 

 quent on the lower face of leaves of spin- 

 ach. 



9. B. citrina, Berk. Mycelium white; 

 fertile filaments erect, articulated, branched; 

 branches sub-cymose, and, like the obovate 

 spores, lemon-coloured. On dead branches 

 of cherry-trees. Berkeley, Ann. Nat. Hist. 

 i. p. 262. pi. 8. fig. 12. 



10. B. curta, Berk. Fertile filaments sim- 

 ple, abbreviated, denticulate at the tips, 

 gray-brown; spores oval. On Anemone nem- 

 orosa, Berk. Ann. Nat. Hist. I. c. pi. 8. fig. 

 13. 



1 1 . B. destructor. Fertile filaments gray, 

 erect, scarcely septate; branches alternate, 

 the last forked, hooked, and divaricated; 

 spores obovate, much attenuated at the base. 

 Very destructive on species of Allium (onions, 

 &c). Berk. Ann. Nat. Hist. vi. p. 436. pi. 

 13. fig. 23. 



12. B. terrestris, Pers. Fertile filaments 

 white, quaternately divided at the tips, each 

 tip bearing a single globose spore. On rotten 

 sticks. Berk. /. c. pi. 14. fig. 24 ; Stachy- 

 lidium terrestre, Grev. Sc. Crypt. Flora, pi. 

 257. 



13. B.Urtica, Libert, MSS. (Berk.). Fer- 

 tile filaments grayish lilac, loosely divided 

 above ; branches forming an acute angle ; ex- 

 treme branchlets simple or forked, sometimes 

 curved, rarely inflated ; spores large, ovate, 

 apex papilliform. On nettle leaves. Berk. 

 Ann. Nat. Hist. ser. 2. vii. p. 100. 



14. B. Jonesii, Berk, and Br. Fertile fila- 

 ments erect, fawn-coloured, branched above; 

 branches and branchlets divergent, mostly 

 opposite, the last fasciculated, the centre al- 

 ways sterile and very acute ; spores roundish, 

 spiny. On dung. Ann. Nat. Hist. 2 ser. 

 xiii. pi. 15. fig. 12. 



15. B. Arenarice, Berk. White; fertile 

 filaments dichotomous above, divaricate- 

 forked, not hooked at the tips; spore ovate. 



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