]62 FUNGOID PESTS OF CULTIVATED PLANTS. 



CONSERVATORY PARASITES. 



Separate from the fungi which affect garden plants there are a few 

 that are troublesome in the stove and conservatory, and these could not 

 be excluded from the present enumeration. In this connection the list 

 might have been much extended, but the persons interested would be 

 rilv limited, as compared with those who confine themselves to out- 

 door culture. 



Sooty Mould of Orange. 



Fumago vagans (Pers.), PL XIV. fig. 21. 



This black mould is familiar enough, as it occurs on the foliage of 

 numerous trees in this country, and especially such as are subject to 

 honeydew. It forms black patches on the leaves, to such an extent as to 

 form a crust ; but in this condition it is simply an imperfect fungus, 

 and may develop into a species of Capnodium or MeUola, as the case 

 may be. 



Tbe creeping mycelium is branching, and closely adnate to the 

 matrix, sometimes confluent and forming cellular ganglia, or torulose, like 

 a string of beads, -constituting an effused thinly membranaceous stratum, 

 which is apt to flake off when dry, and resembling a coating of soot. 

 Short fertile branches arise from this mycelium, which are more or less 

 branched ; conidia at the tips of the branches, often forming short chains, 

 sometimes one-celled, usually two-celled, and sometimes three-celled 

 (5 l"»/( long), dark brown. 



It is found throughout Europe and North America, and in parts of 

 A -it. but it is scarcely probable that we shall be troubled with the 

 advanced stages in this country, whether Capnodium, MeUola, or any of 

 their kindred. 



8acc. Syll. iv. 2618 ; Journ. fi.II.s. iv. 251 ; U.S.A. Dep. Agri. 

 Bull. 8, pi. \ii. ; Mass. PL Dis. p. 101, f. 17. 



Specking of Citrus fruits, in Australia, lias been attributed to a mould 

 fungus /'< "iiicilliinit digitatum, causing a loss of from 2 to 50 per cent, on 

 fruit shipped during the season. 



Jow a. L'.ll.s. xx\iii. p. 248. 



ObangE Sooty BLOTCH. 



Several kinds of " sooty Notch " are recorded, but it is doubtful if any 

 of them art British. 



The Italian sooty blotch, MeUola Penzigii (Sacc. " Fungi Italici," figs. 

 L182 L185), is found in South Europe, and of this Capnodium Citri 

 l ' ibly a form. 



Sicilian Notch, MeUola Cilri (B, & P.), is found on Orange leaves in 

 Sicily. 



Australian blotch. Capnodium cr McAlp.), occurs on loavos 



of Orange and Lemon in Australia. {Mass. PI. Dis p. 108.) 



