56 



JOUKNAL OF MYCOLOGY. 



both terminal and lateral. Conidia oblong to cylindrical and clavate- 

 cylindrical, 1— 3-septate, brownish, 15—50x4—5 !>■. The hyphse foim 

 indefinite, subviolaceons, or greenish-lead-colored patches on the lower 

 surface of the leaf, and also more sparingly so above but without any 

 distinct spots. 



On leaves of Solanum Dulcamara, New York. These notes 

 are from specimens received from Prof. Peck who remarks that "the 

 spots are very unequal in size and often confluent and. wh-n the leaf 

 fades, retain their greenish hue for a longer time." This is still recog- 

 nizable in the dry specimens (collected several years ago ?) The brown 

 hyphse as well as the character of the conidia must remove this from 

 Ramularia. We certainly think it a good Cercospora. In the Report 

 cited it is remarked that ''this species in some respects approaches Peron- 

 ospora." We can not say whether this was inadvertently written for 

 Cercospora. 



101. Cercospora polytricha, Cke. Grev. VII, p. 35. Rav. F. 

 Amer. 291. 



Hypophyllous, forming broad, sooty colored patches but not on any 

 definite spots, at least none that are visible on the upper side of the leaf. 

 Hyphse multiseptate, joints subquadrate, toruloid, brown. Conidia ob- 

 clavate, biseptate, 30—50 /^-long. 



On leaves of Quercus virens, S. Carolina (Ravenel.) This is an anom- 

 ulous species and is not improbably the conidial stage of some Capnodium. 

 The hyphse spring mostly from a small tubercular base (rudimentary 

 perithecium.) 



B. Hyphse nearly hyaline (Ce}"cosporeZZa, Sacc.) 



102. Cercospora chionea, E. & K. Bull. Tor. Club, XI, p. 122. 

 Amphigenous, but mostly epiphyllous, on large (.5 — I cm., or, by 



confluence, 3— 4 cm.) dark, reddish brown spots with a brown, yellow- 

 shaded, but not raised, border. Ilyphse densely tufted, subhyaline, most- 

 ly 18—30 X 4—5 but often elongated to 35 or 40 !->- and then somewhat 

 undulate or crooked above. Conidia vermiform or clavate-cylindric, 54 — 

 90 X 4—5 /J' and 3— 8-septate. 



The conidia are very abundant and appear to the naked eye like a 

 sprinkling of white powder on the brown spots. Diff:erent throughout 

 from C. cercidicola. Ell. 



On leaves of Cercis Canadensis, July, Kansas (Kellerman.) 

 104. Cercospora PERSicA. Sacc. F. Ven. Nov. y,p. 189. Rab.- Win- 

 ter Fungi, E., 3081. 



Hyphse hypophyllous, filiform, somewhat branched above, continu- 

 ous, hyaline, forming irregularly shaped, rather indefinitely limited white 

 patches on the under side of the leaves which are correspondingly marked 

 with pale, yellowish, indefinite spots above. Conidia cylindrical, 40 — 50 

 X 4—5 /^-, imperfectly septate, or remotely guttulate, hyaline or subhya- 

 line. 



On peach leaves, Illinois (Earle.) 



[continued on page 61.] 



