ELISHA MITCHELL SCIENTIFIC SOCIETY. 65 



pophyllous, giving dirty appearance to under surface of 

 the pinnules, which are usually paled above. Hyphse in 

 loose tufts distributed over affected area, reddish brown, 

 septate, minutely guttulate,* irregularly flexuous, genicu- 

 late and profusely denticulate, 100—200 X 4, 5. Conidia 

 obclavate, hyaline, niultiseptate and multiguttulate, 50 — 

 150 X 4—5. 



On leaves of Cassia nictitans, 2197, Auburn, October i, 

 1 89 1, Duggar. 



73. Cercospora erythrogexa n. sp. Hypophyllous, 

 spots indefinite, usually reddening the leaf above, giving 

 dirty appearance to large portion of under surface of the 

 leaves. Hyplup scattered, frequently creeping, often 

 branched, septate, dull reddish brown, flexuous, denticu- 

 late, 50 — 70 X 4, 5. Conidia slender, usually curved, 

 longer ones terete, faintly olive brown, multiseptate and 

 usually guttulate, 30 — 100 X 3, 5 — 4. 



On leaves of Rhcxia mariana^ 1541? Auburn, July 22, 

 1890; Rhexia sp. 181 9, October, 1890; R. virginica, 2066, 

 August 29, 1 89 1, Atkinson. 



74. Cercospora rigospora n. sp. Spots indefinite or 

 absent, but parts of leaf aflfected, usually obscurely yellow- 

 ish above. Hyph^^ hypophyllous, fasciculate, divergent, 

 in sooty patches sometimes ver>' indistinct, or distributed 

 over large areas, fuliginous with olive tinge, subflexuous, 

 denticulate or torulose, longer ones faintly septate and 

 multiguttulate, 50—60 X 3, 5 — 4. Conidia straight or 

 curved, subcylindrical, abruptly tapering at each end or 

 terete, 3 — 10 — septate, multiguttulate, dilutely olive yel- 

 low, 50—70 X 3—4- This is very different from C. 

 6"<9/<7;// Thiini as shown in Myc. Univ., 270, and also from 

 C. diffusa Bll., specimens of which I have seen, both of 

 those being much stouter and the conidia quite different in 

 texture, easily collapsing, while those of C. rigospora are 

 quite firm. Ellis' diffusa seems to me on comparison 



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