CULTUKAL IDENTIFICATION OF SPECIES. 97 



IIII. Surface hyphae qoI in well-defined ropes, nor trailing. 



Surface hyphae woven Qoccose, course of hyphse no1 traceable. 



1 . < rray-green, I< >hlt conidiophores, do odor /'. cam* mberti. 



2. Gray-green, shorter conidiophores, strong odor /'. biforrrie. 



jj. Surface growth al margin simple conidiophores, in older parts both floc- 



■• hyphae and conidiophores. 

 1. Gray-greenish, branching of conidiophore rather loose, odor 



Don • Blighl P. X... 22. 



i'. Green, conidial fructifications rather compact, odor definite, 



"moldy" P. commune. 



X. B. There are probably a number of races in this group. 

 . Fruiting Burface velvety of simple conidiophores or conidiophores I mine 

 lose to surface of substratum as to appear simple: 

 fc. Conidial ma - a dense column of conidial chains. 



1 . ( iolumn from a single verticil of basidia P. spinulosum. 



2. Column from ;i verticil of brachlets with verticillate cells and 



chains /'. rubrum. 



hh. Elements of conidial fructification do1 in a column. 



I. Conidia smooth. 



1. Green, broadly spreading, ripe conidia globose, 4-5/t P. roqueforti. 



2. Green, less spreading, conidia elliptical, medium, commonly 



purpled :.....". purpurogenum. 



3. Gray or oliA e green, conidia, 5 -7 by 3-5/* /'. digitatum. 



II. < onidia delicate rugulose /'. rugulomm. 



Key 2.— Species Determinable from Substrata. 



these species the substratum establishes a presumption of identii 



< !h e < lamemberl and Brie i: 



1. Floccose, white unchangeable, no odor P. camemberti var. rogeri. 



2. Floccose, white to gray-green, no odor 1' . cmnemberti. 



:'.. Powdery, yellowish white, spores smooth, ammoniacal odor, 



P. brevieaule var. (/labrum. 

 I. Powdery, yellowish white, spores tuberculate, ammoniacal odor, 



P. hr< vieaule \-.\v. allium . 

 5. Forming yellowish-brown areas, spores rough, ammoniacal odor. . /'. brevieaule. 



< h e I Roquefort : 



I . < Ireen streaks inside the cheese P. roqueforti. 



< litrua fruits: 



1 . Colonies of mold, blue-green /'. italicum. 



2. Colonies of mold, olive-green P . digitatum=olivaceum. 



Pomaceous fruits (apples, peai 3, etc. i: 



I. Blue-green colonies finally producing coremia /'. expansum. 



Polj poracese - Boleti, Polypori, etc. i: 



1. ('nli. nil'- green (yellowish green) spreading by stolons /'. stoloniferum. 



Wood I pine): 



Producing orange i" red stains in pine wood /'. pinophilum. 



slds Bull. US— 10 7 



