TfilCHODERJIA — ASPEEGILLUS. 295 



Trichoderma lignorum. Harz. (fig. 26, p. 313.) 



Tufts pulvinate, more or less circular, rather compact, 

 then effused, at first white, then from the centre becoming 

 entirely verdigris-green, here and there yellowish ; hyphae 

 very slender, not septate ; fertile ascending, forking into 

 2-3 branches; conidia globose, minute, green, 3 ft. diam., 

 collected into a small head. 



Trichoderma lignorum (Tode), Harz, Einig. Hyph., p. 29, 

 t. iv., f. 6 ; Sacc, SyU., n. 284. 



Trichoderma viride, Pors., Syn., p. 230. 



On bark, wood, rotten leaves, &c. 



The conidial stage of Hypocrea mfa. 



Tribe 4. Aspergilleae. Sacc. 

 ASPEEGILLUS. MicheH. (figs. 20, 21, p. 274.) 



Mycelium creeping, effused, septate ; fertile hyphae or 

 conidiophores erect, inflated and vesiculose at the tip, the 

 vesiculose portion giving origin to numerous radiating 

 chains of gonidia. 



Aspergillus, Mich., Nov. PI. Gen., 212; Sacc, Syll., iv. 

 p. 64. 



The sterigmata borne by the inflated head are often 

 reduced to minute points. Many species are known to be 

 the conidial stage of higher fungi. The mycelium of some 

 species forms sclerotia. 



* Glaucous or greenish. 



Aspergillus glaucus. Link. (figs. 20, 21, p. 274.) 

 Hyphae creeping, floccose, branched, indistinctly septate, 

 uncoloured ; fertile erect, simple, almost without septa, 

 hyaline or with a glaucous tinge, the apess inflated into a 

 vesicle covered with minute cylindrical sterigmata or 

 conidiophores each bearing a chain of conidia ; conidia 

 globose, slightly asperulate, hyaline, then glaucous, 8-10 /*, 

 diam. 



Aspergillus glaucus, Link, sp. pi., Fung., i. p. 67; Sacc, 

 Syll., n. 304. 



