ASYMAIETRICA-DIVARICATA 257 



PeniciUium lilacinum Thom is t-learl}' different from other members 

 of the Divaricata but can, nevertheless, be more satisfactorily included 

 here than elsewhere. 



PeniciUium nalgiovensis Laxa is tentatively assigned to the Divaricata 

 since we believe that it can be keyed here more easily than elsewhere, but 

 in the loose, deep character of its colonies and in the comparatively large 

 dimension of conidia and cellular parts of its penicilli it is strongly sugges- 

 tive of the Lanata Section. 



PeniciUium melinii Thom shows many if not an actual majorit}' of peni- 

 cilli as truly monoveVticillate, but in its general habit, coloration, and 

 cultural characteristics seems to belong with P. nigricans (Bainier) Thom 

 which unmistakably belongs in the Divaricata. 



Pe7iiciUium jenseni Zaleski shows a definite resemblance to some of the 

 ramigenous monoverticillate species but produces sufficient well developed 

 biverticillate penicilli to warrant placement here. 



PeniciUium soppi Zaleski with verticils of metulae, mostly terminal, is 

 clearly suggestive of the P. citrinum series but differs from the latter in the 

 production of small sclerotium-like masses, and in its failure to develop 

 yellow colors or closely compacted columns of conidia. 



PeniciUium godlewskii Zaleski is included here because of the general 

 character of its conidial structures. Colonies are, however, often markedly 

 funiculose and difficulties sometimes arise regarding the correct placement 

 of individual strains. 



Key to the Divaricata 



Page 

 I. Colonies producing perithecia, sclerotia, or masses of thick-walled cells. 



A. Colonies producing true perithecia, at first parenchj-matous throughout, 



then usually sclerotioid, often ripening late Carpenteles series 260 



1. Ascospores lenticular, 2.5 to 3.0m in long axis, with equatorial furrow 



prominent and walls roughened. Perithecia light gray to grayish 

 black (when wet), usually ripening in 5 to 6 weeks 



P. asperum (Shear) n. comb. 263 



2. Ascospores lenticular, 5.0 to 6.0ju in long axis, equatorial ridges parallel 



and often closely appressed, with walls rough. Perithecia buff to 

 light tan, commonlj' ripening in 3 to 4 weeks. P. baarnense v. Beyma 266 



3. Ascospores lenticular, 2.8 to 3.3/j in long axis, with equatorial area 



broad, flattened and usually showing two low, widely separated 

 ridges, with walls smooth. Perithecia in cream to light tan shades, 

 usually- ripening in 2 to 3 weeks P. egyptiacum v. Beyma 269 



B. Colonies producing sclerotia or masses of thick-walled cells, but appar- 



ently not developing asci and ascospores at any stage. 

 1. Conidial areas velvety or nearlj^ so upon most substrata, conidiophores 

 arising from the substratum or from aerial hyphae. 

 a. Conidiophore walls coarsely roughened, sclerotia well organized, 



firm or stony P. raistrickii series 273 



