FUSIDIUM. 281 



On Bulgaria inquinans, the spores are not only much 

 smaller, but also paler and more hyaline than those of 

 Oidium fulvum, Link, and of a different colour. (Grove.) 



***** Conidia grey or blackish. 



Oospora inaequalis. Cke. & Mass. 



Effused, like a very thin pale grey bloom ; conidia very 

 unequal in size and form, globose to elliptical, united in 

 short, simple or branched curved threads, hyaline, from 

 5 /* diameter, to 10 x 5 p.. 



On culms of bamboo. Kew. 



Oospora abortifaciens. Sacc. & Vogl. 



Spots at first very minute and scattered, becoming effused 

 and often confluent; mycelium thin, fertile hyphae erect, 

 very slender, unbranched ; conidia in chains, broadly ellip- 

 tical, grey, 5-6 x 4 /i, falling away and forming a dark grey 

 powder. 



Oospora abortifaciens, Sacc., Syll., iv. 101. 



Oidium abortifaciens, Berk., Ann. Nat. Hist., n. 545. 



In the upper portion of the ovary of various grasses, said 

 to occur also in the ovary of Silene gallica. 



FUSIDIUM. Link. (fig. 18, p. 313.) 



Hyphae short, simple. Conidia fusiform, concatenate, 

 bright coloured or colourless. 



Fusidium, Link, Berl. Mag. (1809), iii. p. 8 ; Sacc., Syll., iv. 

 p. 25. Forming usually exceedingly thin films ; the chains 

 of fusiform conidia with pointed ends mark the genus. 



Fusidium viride. Grove, (fig. 18, p. 313.) 

 Forming bright deep green elliptical spots ; mycelium 



white, thinly effused; conidia concatenate, chains long, 



variously intertwined; conidia exactly fusiform, straight, 



both ends acute, pale green, 10 x 3 /t. 



Fusidium viride, Grove, Journ. Bot. (1885), p. 164, t. 257, 



f. 2; Sacc., Syll., iv. n. 103. 



On dead stems of Heracleum. Spots sub-elliptical, 1-1 cm. 



long, of a pleasing saturated green like a Conferva. (Grove.) 



