176 FUNGOID PESTS OF CULTIVATED PLANTS. 



Chamcerops humilis. It forms dark olive velvety patches of variable size 

 and form, sometimes considerable in extent, with a creeping mycelium. 

 The threads are mostly collected in tufts, and are rather short, flexuous, 

 and sparingly septate, of a pale olive colour. Conidia with one or two 

 septa, elliptical, rounded at the ends, but not constricted at the joints, 

 pale olive (16-20 x 6-8 /A), and externally rough, as in other species of the 

 genus. 



This is also at present only recorded for Britain, but it belongs to such 

 a persistent group of parasites that it will probably be heard of again. 



Grevillea, xvi. 11 ; Sacc. Syll. x. 7767. 



PALM LEAF- SPOT. 

 Exosporium Palmivorum (Sacc.). 



Another palm leaf disease has made its appearance in France on 

 Phoenix canariensis and other species, and is known also in the United 

 States. The conidia have from 8 to 10 septa, and measure 75-95 x 7-9 /*. 

 It has appeared also in Eastern Europe. 



Sacc. Syll. xvi. p. 1106 ; Bull Soc. Myc. de Fr. xxi. fasc. 3, p. 173, 

 figs. 3, 4. 



A small dot-like fungus, Plioma Kentia (Cooke), has been found 

 flourishing on the dead tips of the fronds of Kentia, under cultivation, 

 with sporules 8-10 X 4 //,. It is doubtless only a saprophyte. Other 

 species, assumed to be parasitic, have been described as occurring on 

 Kentia in Algeria, as Plaospora Kentia (Maubl.), Ascochyta Kentia (M.), 

 and Stagonospora Kentia (Maubl.). All of them on living leaves. 

 (Bull Soc. Mycol de France, xix. fasc. 3, p. 293.) 



BAMBOO MOULD. 

 Oospora inaqualis (C. & M.). 



This is a thinly effused white mould, found on the culms of growing 

 Bamboos, under certain conditions of weakness. It spreads broadly but 

 thinly like a glaucous bloom, of a pale grey colour. 



The conidia are unequal in size and form, from globose to elliptical, 

 united together, end to end, in short curved and either simple or branched 

 threads, colourless, and when globose 5 ^ diam., attaining to double that 

 length, with the same diameter. 



The specific name has since been changed to Oospora Cookei by 

 Saccardo on account of the prior adoption of inaqualis. 



It is scarcely probable that it would resist moderate spraying. 



Grevillea, xvi. p. 10 ; Sacc. Syll x. 7057. 



PESTS OF THE ORNAMENTAL SHRUBBERY. 



Notwithstanding the entirely artificial character of such subdivision, it 

 appears to be the most practical method to separate ornamental shrubs 

 into the two groups of evergreen and deciduous, independently of 

 anomalies which may here and there obtrude themselves. The same 

 parasite very rarely attacks both coriaceous- and tender-leaved plants. 



