62 



JOURNAL OF MYCOLOGY. 



[Vol. I, 



On leaves of SoUdago altissima, Catskill Mts.. N. Y., Aug., (Peck.) 



106. Cercospoea GKiSELLA, Pk. 33d Kep. N. Y. State Mus., p. 29. 

 ''Spots suborbicular, indeterminate, yellowish. Hyplise short, 



minutely tufted, septate. Conidia slightly thickened towards one end 

 (below V) or subfusiform, colorless, triseptate, 40—50 long. Living 

 leaves of Erigeron annuum, July, Y. (Peck.) The tufts are so 

 numerous and so minute as to give the under surface of the leaf the 

 appearance of being suffused by a minute pruinosity.'- 

 Is this sufficiently distinct from Cercospora cana Sacc. ? 



107. Cercospora Toxicodendri, Ell. Am. Nat., Oct. 1882, p. 811. 

 Tufts snow white on black spots (1—2 mm). Plyphse short, 25—30 x 



5i /^-, pale brown. Conidia slender obclavate, faintly multiseptate, hya- 

 line, attenuated above, 50—60 x 5—6 /J-. 



On leaves of Bhus Toxicodendron, Newlield, IST. J. Not since found, 

 and hence doubtful. 



108. Cercospora Apocyni, E. & K. Bull. Tor. Bot. Club, XI, p. 121 

 Amphigenous, on small (1—3 mm.) brown spots with a narrow 



raised border ; often occupying only a small (1 mm.) circular area on the 

 brown spots, or sometimes several small white patches of conidia on the 

 same spot. Hyphse very short, 16—20 x 2.5 f^, tufted, hyaline, simple, 

 entire. Conidia narrow-cylindric, 45—60 x 2.5 granular and becoming 

 faintly 3 — 4-septate. 



The spots are at first purplish brown, with a purplish border, but 

 become rusty brown except where wnitened by the conidia. 



On leaves of Apocynum, Aug., Kansas (Kellerman.) 



C. Species standing ambiguously between Cercospora and 

 Bamularia. ^ 



(The species originally intended to be placed here will be included in 

 the enumeration of the species of Eamularia. ) 



The following species were received too late for classification. 

 (109.) Cercospora Lepidii, Pk. 35th Kep. N. Y. State Mus. 



Spots small, orbicular, grayish-brown or subcinereus, usually marked 

 with faint concentric lines. Hyphse amphigenous, about 35 long, single 

 or two or three in a cluster, pallid. Conidia very long, tapering upwards, 

 slightly constricted at the septa, eight to nine-septate, 150—200 long 

 20—25 i« wide in the widest part, greenish. 



On living leaves of Lepidium campestre, May, N. J. (Peck.) 



This is a very singular species. The fungus occurs on both sides of 

 the leaf, but is more abundant on the upper side. The hyphse are short 

 and thick, and occasionally branched. The septa occur in the broad part 

 of the spore, the upper part being much narrowed. Occasionally a cell is 

 divided by a longitudinal septum. 

 (110.) Cercospora Dattjrjs, Pk. 35th Eep. N. Y. State Mus. 



Spots suborbicular or irregular, varying in color from cinereus to 

 reddish-brown, sometimes marked by irregular or flexuous elevated lines. 



