ASYMMETRICA-VELUTINA 363 



notatum. Westling. The strain is regarded as somewhat transitional in the 

 direction of that species. 



NRRL 843, cited above as a large-spored form, differs from such loose- 

 textured strains as NRRL 1951 principally in producing conidia of larger 

 dimensions. This strain is believed by us to have approximated the kind 

 of culture upon which Westling based his species Penicillium baculatum. 



NRRL 792, received from Biourge as the type of his Penicillium rubens, 

 represents a rapidly spreading, prominently furrowed, loose-textured form, 

 producing conidial areas in rather bright yellow-green shades, penicilli that 

 are loosely constructed and sometimes almost divaricate, and strongly 

 elliptical conidia. Culturally this strain is somewhat suggestive of P. 

 cyaneo-fulvum Biourge . 



NRRL 889, received from Biourge as representing his type of Penicillium 

 roseo-ciireum (see p. 364), produces lightly furrowed, deeply lanose to floccu- 

 lent colonies 2-4 mm. deep which show the general cultural characteristics 

 of the Lanata section but produces abundant yellow exudate and pigmenta- 

 tion, develops asymmetric penicilli typical of the present series, and upon 

 suitable substrata produces some penicillin. This strain and others ap- 

 proximating it are regarded as possibly transitional toward P. cyaneo-fulvum 

 Biourge. 



Species described by other authors which are regarded as either approxi- 

 mating Penicillium chrysogenum Thom, or to be inseparable from it include 

 the following: 



Penicillium baculaUim Westling (Svensk Botanisk Tidskrift 4: 139-145, text figures 

 1-3. 1910; see also Arkiv for Botanik 11: 53, 79-83, figs. 11 and 53. 1911. Compare 

 Biourge, Monogr., La Cellule 33: fasc. 1, pp. 186-188; Col. PI. IV and PI. VII, fig. 40. 

 1923; and Thom, The Penieillia, pp. 268-269. 1930) was described originally as an 

 ascosporic species producing lenticular ascospores 4.2 to 4.8ai by 5.2 to 6.0^. Thom 

 received two cultures under this name from Westling, from the second of which a 

 strain of Aspergillus repens was isolated by adding high percentages of sugar to the 

 culture. There is reason to believe that the perithecia observed and described by 

 Westling belonged to this Aspergillus. The Penicillium present in each of the two 

 cultures belonged to the group with P. chrysogenum Thom. Westling's organism 

 appears to have been somewhat looser-textured than most, and to have produced 

 large conidia with more pronounced ellipticity, probably approximating NRRL 843 

 listed above among the strains representative of P. chrysogenum. Otherwise, the 

 culture probably represented a typical strain of Thom's species, and P. baculatum 

 is regarded as synonymous with this well recognized form. 



Penicillium chlorophaeum Biourge (Monogr., La Cellule 33: fasc. 1, pp. 271-273; 

 Col. PI. VIII and PI. XIII, fig. 78. 1923. Thom, The Penieillia, pp. 262-263. 1930) 

 as known from Biourge's type, reported by Thom in 1930 as No. 4733.31 and now 

 maintained as NRRL 817, represents a form producing comparatively deep, loose- 

 textured, velvety to almost lanose, lightly sporulating colonies light blue-green to 

 gray-green in color, producing abundant colorless to light tan exudate, and with re- 



