344 THE JOURNAL OF BOTANY 



The biseptate spores in A.' AquilegicB ave abnormal ; they are 

 found also in A. liosce, but still more rarely. There are allied (non- 

 European) species which have normally two or more septa : these 

 have been segregated under the name Asteromidium. 



HrPIIOMTCETES. 



58. FUSIDIUM YIEIDE Gr. 



After many years (thirty-four) I have found this fungus again, 

 this time upon the cut surfaces of potatoes which had been chopped 

 and thrown upon the ground in an allotment near Birmingham, in 

 July of the present year. In the meantime it has been reported from 

 Yorkshire on old stems of Foxglove and Butterbur. The present 

 specimens enable it to be added that the size of the spores varies 

 from 5 X 2 ^ up to 9x3//., and that the colour of the large patches 

 (about 2 cm. across) is nearly that called " invisible green " or 

 " riileman green," their deeper colour being due to the richer develop- 

 ment of the fungus. 



301. Eamulaeia ScEOPiiULARi^ Fautr. & Roum. in Rev. Mycol. 

 1891, p. 81. Sacc. SylL x. 561. 



B. mcolai Bubak, Pilzfl. Montenegr. 1903, p. 19. Sacc. Syll. 

 xviii. 552. Ovularia cariieola Sacc. Syll. iv. 122 ; Fung. Ital. 

 t. 975. O. duplex Sacc. Syll. iv. 143 ; Fung. Ital. t. 976. 



Spots 1-4 mm. broad, very angular (bovmded by the veins and 

 venules), greenish-brown, then ochraceous and surrounded by a dark- 

 purple border. Tufts hypophyllous, minute, numerous, colourless, 

 composed of many densely fasciculate hyphse, which are at first 

 eseptate, not straight, about 3 [x broad, here and there denticulate and 

 ± pointed at the apex. Spores in chains, ovoid or oblong, 5-16 X 

 3-4 /t, quite hyaline, the longer ones sublinear and at length 1-septate. 



On living leaves of Scroplmlaria nodosa, Ayrshire (Boyd). 

 Trench Woods, Droitwich. July, Aug., 1918. 



In the Droitwich specimens only a few of the spores were 

 1-septate, and these were, as is usual in such cases, longer and 

 narrower (down to 2 jx) than the average. The hj^phae and spores 

 can hardly be distinguished from those of JR. variabilis on Digitalis, 

 but tlie spots are widely different. With some of the tufts were 

 mingled stouter hyphiTB which showed a distinct olivaceous tinge, and 

 there were a few faintly olivaceous spores, but these were obviously 

 heterogeneous and should be regarded as mere intruders. In that 

 case O. duplex Sacc. would naturally fall under the same species, as 

 indeed is probable on other grounds. 



Mr. Boyd's specimens (West Kilbride) agree in every respect 

 with O. carneola, except that there is no tinge of rose colour. There 

 can be little doubt that they are that species, for a rosy tint is often 

 found in white Hyphomycetes and is not of specific importance : 

 see Journ. Bot. 1912, p. 14. The spores are roundish to ovoid- 

 oblong, 4-7 X 3 /x, and form long branched chains on tufts of hyphis 

 reaching 50 X 3 /i. The spots are similar to those described above, 

 but with a greenish-brown, not purplish border. On another leaf 

 (Stevenston, Ayrshire) the spots have hardly any ochraceous centre, 



