338 MORPHOLOGY OF THE ASPERGILLACE^E. 



deviations occur. The sterigmata(i7 by 2.1 /*) are more pointed, 

 and longer (in comparison with the head) than in most other 

 species, the conidia decidedly elongated (ellipsoidal), very small 



FIG. 179. Penicillimn luteum. 



Typical conidiophore (a), sterigiuata (6), and conidia () ; c, ascosporcs on the vege- 

 tation (nat. size) ; d t section of ascospore with medulla (TO), skin (r) and groups 

 of asci (a) ; e, free ascus ; /, spores viewed from the side and in section, showing 

 barrel-hoop fillets ; g, germination of ascospore ; it, hyphae with yellow granules. 

 Magn. of a, 1000 ; of b, 2000 ; of d, 15 ; of e, 1200 ; of f, 2400; of y, 900 ; of h, 

 500 ; of k, 2000. (After Wehmer.) 



(2.3-3 by 1.4-2 jj) see also 8, Fig. 177 smooth, delicate, hang- 

 ing together firmly in long chains, dull grey in colour, but 

 greenish grey when heaped up. According to WEHMER (XXI.) 

 coremia are frequently developed, occasionally extensive, very 

 handsome, and up to i cm. in height. The ascospores, which 

 were first observed by ZUKAL (III.), and afterwards more par- 



