678 A MANUAL Ot* tHE PENICILLIA 



These forms are common in nature and representatives of the series have 

 found their way into many collections. One of them was discussed by 

 Thom in 1910 as Penicillium roseum Link. The substitution of the name 

 Gliodadium for Penicillium was first suggested by Bainier (1907). The 

 description of Thom's form, which is representative, and notes as to its 

 distribution, follows : 



Gliodadium roseum (Link?) Bainier, in Bui. Soc. Mycol. France 23: 111-112, 



PI. XV, fig. 1-6. 1907. 

 Probable Synonym : P. roseum Link, in Obs. II, p. 37, 1816; see also 



Link, in Sp. Plant Ed. 4, Vol. 6, pt. 1, p. 69, 1824; 

 Fries, in Sys. Myk. 3, p. 409, 1829; Persoon, in 

 Myc. Europ. 1822; and Thom, in U. S. Dept. 

 Agr., Bur. Anim. Ind., Bui. 118, p. 49, fig. 15, 

 1910. 



Colonies on all common media growing rapidly (fig. 169A and B), white 

 to pink or salmon in fruiting areas, aerial mycelium loosely floccose or 

 funiculose, with simple hyphae and ropes of hyphae irregularly producing 

 colorless, through cream to pinldsh masses up to 1 mm. or more deep in old 

 cultures; conicUophores borne as perpendicular branches from aerial hyphae 

 or ropes of hyphae, 45 to 125m in length (fig. 169C); penicilU up to 140m 

 in length, irregularly once- or twice-branched alternately or verticillately 

 (fig. 169D), with sterigmata varying from 12m by 2.0 to 3.0m in verticils of 

 5 or less to 17m by 2.3m when solitary, bearing conidia which typically be- 

 come aggregated into gelatinous balls or masses; conidia colorless (some- 

 times pink or rosy in mass), eUiptical, 5 to 7m by 3 to 4m, sUghtly apiculate, 

 smooth, appearing delicately granular witliin. 



Thom's strain was bought from Krai, in Prague, Bohemia. Closely 

 similar organisms have been commonly isolated in tliis Laboratory, or re- 

 ceived from correspondents in this country and abroad. A specimen under 

 the name Penicillium roseum Link, as No. 1179 in DeThumen's Mycotheca 

 Universalis, collected by Ravenel in South Carolina in 1876 upon leaves of 

 Buxus, is contained in the mycological collections of the Bureau of Plant 

 Industry, United States Department of Agriculture. The number of speci- 

 mens found under the name P. roseum Linlc from wddely scattered workers 

 appears to justify the beUef that the above form represents the type of 

 organism described by Linlv under this name. 



Since the development of a mucilaginous mass enveloping the conidia 

 has come to be regarded as sufficient basis for separation of species under 

 the generic name of Gliodadium, the species should become Gliodadium 

 roseum (Linlv), as reported by Thom in 1930. Bainier (1907) indepen- 

 dently, and ^\ithout reference to Link, described a new species as Glio- 



