50 One Thousand Objects 



). In blackish velvety patches on fallen sticks. 

 There are jointed threads, dark-coloured at the base, and 

 spores divided transversely by three septa, scattered 

 amongst them. (PI. V., fig. 31.) 



352. HOLLY BLACK ^WLD^elminthosporiumSmithii}. 



Rotten twigs of holly are often sooty with a mould of 

 this species, which is of a similar character to the fore- 

 going, but the spores are not so much divided. Other 

 species are found on herbaceous plants, lime twigs, oak 

 branches, rotten sticks, and dead wood. 



353. CABBAGE MOULD (Macrosporium cheiranthi). 

 The decaying leaves of the field beet, and those of some 

 other plants, often bear the blackish patches of a kind of 

 mould, the spores of which resemble those figured in 

 PI. IV., fig. 36, except that they are almost colourless. 

 Another species is common on decaying cabbage leaves. 



354. COMMON PLANT MOULD (Cladosporium herbaruni}. 



One of the commonest of fungi, and found on almost 

 all damp decaying vegetable matter, in olivaceous patches 

 consisting of floccose threads, which are more or less 

 branched, and bear uniseptate spores. 



355. COMMON CHAIN MOULD (Aspergillus glducns). 

 This is one of the common Moulds which appear on vari- 

 ous kinds of decaying substances. The slender stem bears 

 a globose head, from which spring necklaces of minute 

 spores. The colour is very variable. (PL V., fig. 23.) 



356. POTATO MOULD (Peronospora infestans). This is 

 the mould too well known as connected with the potato 

 disease. It appears on the stem and leaves in the form 

 of delicate branched threads. The upper portion of the 

 branches with swollen nodules, and terminated 'by solitary 

 spores. (PI. V., fig. 25.) 



357. LETTUCE MOULD (Peronospora gangliformis). 

 Frequent on lettuces and allied plants belonging to the 

 natural order Compositae. The branches terminate in a 

 swollen, subglobose head, bearing several spicules, each 

 spicule surmounted by a spore. (PI. V., fig. 27.) 



358. SANDWORT MOULD (Peronospora Arcnaria). This 

 is found upon Arenaria trinervis and some other species. 



