MACROSPOEIUM. 431 



MACEOSPOEIUM. Fries, (fig. 25, p. 397.) 



Hyphae subfasciculate, rather flaccid, erect or ascending, 

 simple or branched, coloured, bearing at or near the tips 

 oblong or clavate, nruriform, coloured conidia. 



Macrosporium, Fries, Syst. Myc., iii. p. 373 ; Sauc., Syll., 

 iv. p. 523. 



On trunks, herbaceous stems, leaves, &c. ; usually sapro- 

 phytes, but sometimes on living or languid portions. Often 

 forming olive-black, more or less extended patches. 



Macrosporium commune. Eabh. 



Tufts numerous, densely gregarious, brownish; hyphae 

 subfasciculatc, ascending, septate, not constricted at the 

 septa, brown, 80-90 x 4-6 ; conidia variable in form, oblong, 

 obovate, or clavate, attenuated at the base, 3-5-septate, septa 

 transverse, oblique or longitudinal, olivaceous, epispore 

 sometimes minutely granular, 18-35 X 8-14 p.. 



Macrosporium commune, Eabh., Fung. Eur. Exs., n. 1360 ; 

 Sacc., Syll., iv. n. 2499. 



On the decayed portions of various plants. 



Considered to be the conidial condition of Pleospora 

 Jierbarum. 



Macrosporium sarcinula. Berk. 



Forming compact patches ^-| in. across, white and downy, 

 then blackish-olive; hyphae suberect, delicate, sparingly 

 branched, soon disappearing after maturity ; conidia clavate, 

 at length divided by septa into cuboid portions, yellow, then 

 olive-brown, 14-24 x 8-10 /x.. 



Macrosporium sarcinula, Berk., Aim. Nat. Hist., n. 125, t. 8, 

 fig. 10 ; Sacc., Syll., iv. n. 2500. 



On rotten cucumber fruits, also on dry grass leaves. 



Macrosporium cladosporioides. Desm. 

 Spots large, irregular, fulvous, tufts velvety, minute, 

 numerous; hyphae erect, simple, nodulose, septate, semi- 

 hyaline, fasciculate, 150-200 x 5; conidia olive-brown, 

 semi-pellucid, sometimes toruloae, unequal, 2-3, or up to 

 10-septate, ovoid, oblong or elongated, club-shaped, attenuated 

 below and shortly pedicellate, 1575 p. long. 



