680 A MANUAL OF THE PEXK'ILLIA 



Thorn, The Penicillia, p. 504. 1930. It is now impossible to know just what type of 

 mold Corda had at hand when he described G. penicilloides except that it was verti- 

 oillately branched and colorless, and that the conidia collected into a mucilaginous 

 mass. In their Summary of Soil Fungi, Oilman and Abbott (1927) gave conidia as 

 elliptical to bacillate, smooth, 3.5-4.0^ by 2.0ai. These measurements are definitely 

 less than those observed in cultures which we have assigned to the G. roseum series, 

 and provisionally regard as probably representing G. roseum (Link) Bainier. Strains 

 ranging all the way from almost sterile to heavily sporing and from wholly colorless 

 to pale rosy pink (approaching but not reaching G. vermoeseni) have been examined, 

 and it is our general observation that the amount of color correlates fairly closely 

 with the quantity of conidia produced. We have not observed marked differences 

 in the dimensions of conidia. Careful comparative studies will be needed to deter- 

 mine whether a satisfactory line of separation can be established between G. peni- 

 cilloides and G. roseum. We are led to believe that the two merge insensibly into 

 each other, and that the former probably represented merely a colorless or lightly 

 colored form of the latter species. 



Acrostalagmus roseus Bainier, in Bui. Soc. Mycol. France 21: 225-227, PI. XII, figs. 

 1-9. 1905. Conidial structures described as verticillately branched; sterigmata in 

 verticils of 3 to 5 and measuring 16/i by 2.0m; conidia rosy en masse, ovoid to globose 

 2.0 to 6.0|i by 2.0 to S.Op, becoming embedded in a mucilaginous mass. 



Isaria clonostachoides Pritchard and Porte, in Phytopathology 12: 167-172, PI. XII 

 and fig. 1. 1922. This coremiform fungus bearing enslimed masses of pink to pale 

 salmon colored conidia probably represented one of the Gliocladium roseum series. 



Gliocladium vermoeseni (Biourge) Thorn, in The Penicillia, 



pp. 502-503. 1930. 



Synonym: Penicillium vermoeseni Biourge, in Monogr., La Cellule 33: 

 fasc. 1, p. 230, PL XXIII, fig. 137. 1923. 



Described by Biourge as follows: 



Colonies on wort gelatine, producing numerous salmon colored coremia 10 mm. in 

 height or more; conidiophores about 5ai in diameter; metulae 7 to 15/i by 2.5 to 5.0m, 

 irregularly borne, irregular in number or none; sterigmata 10 to 20m by 2.5 to 3.5m, 

 in groups of 2 to 5, or even 7; conidia elliptical 5.0 to 7.5m t\v 3 to 4m. Habitat : Certain 

 species of Areca (palms) parasitic or semi-parasitic. 



A culture under this name was received from Dr. Westerdijk in 1926 

 and noted by Thom (1930) as having two forms of conidia, a rosy form and 

 a green form. The two forms were readily separated, and the rosy form 

 was compared with Biourge's discussion of Penicillium vermoeseni. There 

 was good reason to believe this to be Biourge's organism and probably his 

 type strain transmitted through several workers. The following descrip- 

 tion is based upon our cultures of this strain. 



Colonies on Czapek's solution agar, broadly spreading, covering the en- 

 tire surface of the substratum in petri dishes within 8 to 10 days, loosely 



