Fungous Flora of the Soil 



497 



132.— 

 Harm ode n- 

 drum Hordei 

 Bruhne. A, 

 conidiophore 

 and conidia. 



X 355; P, 

 conidia en- 

 larged, X 800 



Hab. Isolated from soil taken from oat field, Ithaca, N. Y., July, 1910, 

 and experimental field in North Cohocton, N. Y., by the writer. Plant 

 pathology herbarium No. 5,926. 



The fungus has been cultivated on potato agar, gelatin, 

 nutrient agar, and straw plugs. The conidiophores do not 

 vary materially, and spores always show septa and are (^ ^rj^ 

 verrucose. Description is taken from fungus growing on B 

 straw plugs, gelatin, and nutrient agar. @ 



. Hormodendrum cladosporioides (Fres.) Sacc, Mich. 2: pj^ 

 148. 1881. 



Syn. Penicillium cladosporioides Fres., Beitr., 22. pi. j, figs. 2j-j8. 

 1850. 



Colonies olivaceous, round, dense; mycelium branched, 



septate, with age becoming articulate and guttulate, 2-5^ 



in diameter; conidiophores erect or ascending, branched, 



ioo-200/i high by 3-5^ in diameter, olivaceous, toward 



apex gradually attenuate, ultimate branches copiously dividing with 



predominant tendency to dichotomy, septate, articulate above; conidia 



cylindrical to broad oval, olivaceous, 3-6 by 2.5-3.6^, continuous or 



inferior ones rarely septate. 



Hab. Isolated from oat field, July, 19 10, 



and from plant-breeding plats, Cornell University, 



Ithaca, N. Y., November and December, 19 10; 



and repeatedly by the writer during summer, 



191 1, at North Cohocton, N. Y., from the 



experimental potato plats. Plant pathology 



herbarium No. 5,927. 



Hormodendrum pallidum Oud., Arch. Neerl. 



^'.IS;;;^^';/?/;;™ Sci. Nat. ser. ., 7: ^93. pi- 34. figs. 2-j. .90,; 



Sacc. A, conidiophores Nederl. Kruidk. Arch. ser. 3, 2: 914. 1903; 



SlS^t^iS'f/.!: Cat. Rais. Pays-Bas. 506.^ .904. Sacc. Syll. 



nidiophore, and conidia, Fung. i8: 581. 1906. Lindau, Rab. Krypt. 



X 236.6; C old articulate -pi^.^^ ak+ q ,. ^^, -r^^-, 

 hypha,x 236.6 -^lora Abt. 8, I. 704. 1907. 



Colonies orbicular, gray (Sacc. Chromot. No. 

 2), not plainly zonate; vegetative hyph^e creeping, articulate, partly 

 thin with homogenous protoplasm, partly thicker with foamy contents; 

 conidiophores erect, very light gray, upward dendroidly branched; 

 primary and even secondary branches decussate, each succeeding branch 

 and branchlet shorter than preceding, consisting of single cells, con- 

 stricted at septa so as to make separation very easy; ultimate 

 articulations small and serving as conidia, variable in size, 12-20 

 by 5-8iu. 



