76 



JOURNAL OF mXOLOGT. 



[Vol. I, 



branches ?) and with tips subacute, or obtuse. Conidia varying from 

 acutely elliptical, 6 — 10 x 21 — 3 .'J- to narrow cylindrical, 15—25 long, 

 continuous or rarely 1—2 septate, concatenate, the chains of spores often 

 branching. This last character is (as Fresenius remarks) easily recog- 

 nizable, even in single isolated spores in which, p irticularly the longer, 

 cylindrical ones which form the lower part of the chain, a little lateral 

 globose sphere is often seen just below the apex, being, in fact, the com- 

 menceLTient of a new chain or branch. The author last cited also re- 

 marks that the hyphse with obtuse tips show 2—5 scars marking the 

 point of attachment of as many spores. In the Iowa specimens we have 

 seen hyphse with at least three of these scars on a single tip. 



On leaves of Urtica gracilis, Wisconsin (Trelease), Iowa (Holway). 



11. Ramularia Euonymi, E. & K., Jour. Mycol., I, 3. 

 Amphigenous, on dirty white spots, 2—3 mm. in diameter, with a 



dark but scarcely raised border. Hyphse arising from a tubercular base, 

 csespitose, hyaline, simple and subentire or slig'htly toothed above ; coni- 

 dia concatenate, oblong-cylindrical, mostly 1-septate, (occasionally 2—3 

 septate) hyaline, 20—25 x 3 /^-. Accompanied by minute, black, immature 

 perithecia scattered over dead parts of the leaf, the whole being proba- 

 bly the conidial and pycnidial stage of some Sphserella. This has much 

 the same general appearance as Cercospora Euonymi, EIL, but the spots 

 are larger and more irregular in shape without any distinct colored bor- 

 der, and the character of the conidia show it to be quite distinct from 

 that species. 



On leaves of Uuonymus atropurpureus, Oct., Kansas (Kellerman.) 

 h. Spots brown or brownish. 



12. Ramularia HAMiVMELiDis, Pk., 35th Rep. N. Y. State Mus., 

 p. 141. 



Spots small, angular, reddish brown, a little paler on the lower sur- 

 face. Hyphse hypophyllous, tufted, short, slightly colored. Conidia 

 fusiform or oblong-cylindrical, colorless, 12—35 /-^' long. 



On living leaves of Hainamelis Virginica, July. Tufts very minute, 

 scarcely visible to the naked eye. K. Y. (Peck.) 



13. Ramularia Rudbecki^, Pk., 34th Rep. Y. State Mus., p. 47. 

 Spots variable in size, frequently confluent, angular, included by the 



veinlets, brown. Hj^phse hypophyllous, tufted, short. Conidia subcyl- 

 indrical, rounded at the ends, colorless, 30—50 long, sometimes concat- 

 enate and obscurely septate. 



On living leaves of Eudbeckia laciniata, Catskill Mts., IST. Y. (Peck.) 



14. RAMTJLARIA IlVIPATIENTIS, Pk., 1. c. 



Spots few, suborbicular, reddish brown, the margin subindeterminate. 

 Hyphse very short and inconspicuous, 10—15 x 3—4 /^-, oblong or clavate, 

 denticulate above. Conidia epiphyllous, oblong, subacute, granular, 

 15—22 X 4 fJ-. The tufts or hyphse are very minute and appear like a fine, 

 white mould on the brown spots. 



On Impatiens fulva, N. Y. (Peck.) 



