276 FUNGUS-FLORA. 



conidia globose or broadly obovate; wall thick, pale red, 

 6-7 or 6 X 8 /*. 



Chromosporium lateritium, Sacc., Syll., v. iv., n. 5. 



Gymnosporium lateritium, B. & Br., Ann. Nat. Hist., n. 

 1903. 



On bark. Bare. 



When mature the conidia are globose, but are at first, 

 as is always the case, obovate, and sometimes in this con- 

 dition break away with a portion of the supporting hypha. 

 (Described from type in Herb. Berk., Kew.) 



Chromosporium rubiginosum, Cke. & Mass. 



Eust-coloured, in effused patches, pulverulent, conidia 

 profuse, elliptical, smooth, pale orange, 10 x 7-8 j*. 



Chromosporium rubiginosum, Cke. & Mass., Grev., vol. xvi. 

 p. 78 (188). 



Gymnosporium rubiginosum, Carm. MS. 



Forming orange-rust-coloured scattered patches on dead 

 leaves. Distinguished from C. lateritium by the larger 

 spores. (Described from type in Herb., Ke\v.) 



MICEOSTKOMA. Niessl. (fig. 29, p. 313.) 



Forming effused, plane, thin patches, fertile hyphae very 

 short, erect, densely crowded, colourless, aseptate; conidia 

 acrogenous, elliptical, one-celled, colourless. 



Microstroma, Niessl, Mahr., Crypt. Fl., p. 163; Sacc., Syll., 



Mycelium creeping, giving origin to erect, densely crowded, 

 short, simple, or slightly branched conidiophores. 



Forming scattered or effused exceedingly thin patches on 

 fading leaves. 



Microstroma album. Sacc. (fig. 29, p. 313.) 

 Patches minute, scattered or becoming confluent, very 



thin, hypophyllous ; conidiophores subclavate, sometimes 



with a tendency to become lobed at the apex, 20-25 //, long ; 



conidia colourless elliptic oblong, sometimes slightly oblique, 



5-7 X 2-5-3 fL 



Microstroma album, Sacc., F. Ital.,t. 863; Sacc., Syll., n. 17. 

 On fading oak leaves. Not uncommon. 



