OOSPORA. 279 



On Tubercularia vulgaris, Nectria cinnabarina, and the 

 adjacent bark. (Grove.) 



** Conidia yellow. 



Oospora favorum. Sacc. & Vogl. (fig. 1, p. 274.) 

 Tufts minute, white, unconspicuous, hyphae branched, 



intertwined, septate, fertile branches erect bearing short 



chains of yellow, subglobose conidia, 4-5 jt*. 

 Oospora favorum, Sacc., Syll., iv. 83. 

 Oidium favorum, B & Br., Ann. Nat. Hist., n. 762, t. 16, 



f. 14 ; Cke., Hdbk., n. 1815. 



On honey-comb. Bare. (Type in Herb. Berk., Kew.) 

 An examination of type specimen shows the conidia 



subglobose and concatenate in short chains. When quite 



young the conidia are filiform. 



Oospora microsperma. Sacc. & Vogl. 



Tufts minute, scattered, equal, yellowish-ochre, hyphae 

 branched, septate, radiating, conidia in chains, subglobose, 

 pale yellow, 4-5 /*. 



Ooespora microsperma, Sacc., Syll., iv. 84. 



Oidium microspermum, B. & Br., Ann. Nat. Hist., n. 1387. 



On bark of fir. Bare. 



Tufts about | line across, gregarious, numerous. (Type 

 in Herb. Berk., Kew.) 



*** Conidia rose-colour, red, or orange. 



Oospora rosella. Grove. 



Hyphae fasciculate, at length effused, long, erect, then 

 effused, branched, 2-3 p. thick, aseptate, hyaline; conidia 

 concatenate in rather long simple chains, rosy, elliptical, 

 apiculate at both ends, 10 X 4 /*. 



Oospora rosella, Grove, Journ. Bot., n.s., vol. xiv. p. 163; 

 Sacc., Syll., iv. 63. 



On horse-dung. Bare. 



Tufts ^-1 mm. high, becoming confluent. Allied to 

 O. fasciculata, but distinguished by the colour of the 

 conidia. 



