1S85.] 



NORTH AMERICAN RAMULARLE. 



8] 



This and the preceding species might with about equal propriety be 

 referred to Cercospora. 



35. Kamularia Grindeli.i:. K Bull. Torr. Bot. Club, XI, p.,122. 

 Amphigenous, erumpent, punctiforin. Hyphte densely tufted, simple 



hyaline, nearly straight, 18—25 x 3—4 /^-. Conidia cylindrical, straight or 

 slightly curved, hyaline, 1— 2-septate, 20—40 x 3—4 /^-. The tufts of 

 hyphse" (150—200 in diameter) are collected in little groups forming 

 rusty-yellow specks thickly scattered over both sides of the leaf and 

 tin ally whitening out. 



B. COXIDIA OVATE. 



a. Conidia continuous. [Ovularia. So.cc.) 



36. Ramularia 3I0XILI0IDES, E. & M.. sub Ovularia, in Am. 2sat.. 

 Jan. 1885, p. 76. Ovularia JlLjricm, P'k. in Uteris. 



On reddish-brown, round spots, 1—4 mm. in diameter. Hyphre liypo- 

 phyllous, fasciculate, hyaline sparingly septate and often branched above, 

 35—60 X 3 /-''. Conidia concatenate, 2--4 connected, obovate, hyaline, con- 

 tinuous, 12—17 X 9—12 fJ-. 



On living leaves of 2fyrica, Magnolia, Mass., June 1SS4 (Miss 

 Clarke.) Adirondack Mts., X. Y. (Peck.) 



The hypli£e are often elongated to 100 and even 120 



37. flA^iULARiA OBOVATA, Fckl. Symb. Mycol. p. 103. 



Spots mostly orbicular, arid, 2—8 mm. Hyphse amphigenous but 

 mostly hypophyllous, fasciculate, simple or subramose, hyaline, continu- 

 ous or rarely with a single septum below, 70—125 x 3—4 !->■. Conidia 

 oblong-obovate, continuous, 18 — 25 x 8—11 P-. 



On leaves of Bumeo:, Massachusetts (Farlow). 



38. Ramularia Pyrol^ (Trelease). Prelim. List, parasit. Fungi. 

 Wis. p. 14. 



Spots circular, dark. Conidia colorless, round-oval to oblong, fre- 

 quently acute at one end, 3^ — 6x 6—17 usually 4 x 12, not septate. 

 On leaves of Pyrola rotundifolia, Wisconsin (Trelease). 



39. RAiiTJLARiA isARioiDES (Sacc.) Mich. 11, p. 58. Oidium irregulare, 

 Pk. 33d Rep, p. 29. 



Spots amphigenous, brown, with a naiTOw% darker border. Ilyphge 

 liypophyllous, densely fasciculate, generally appearing along the nerves 

 of the leaf, filiform, very long (100—150 x 2 /^-), continuous, hyaline above, 

 yellowish below. Conidia broad, fusoid or ovate, 10—18 x 4—6 /^-, subap 

 iculate at each end, continuous, hyaline. 



On leaves of Stapliylea trifolia, Penn. (Martin) Wisconsin (Trelease). 

 fj. Conidia uniseptate. 



40. Ra^iularia didyma, linger. Exanth. p. 169. Bidyma.ria Ungeri, 

 Cda. 



Spots orbicular (2 — 4 mm.), black at first then dirty w^hite with a 

 black center, a large part of the leaf becoming finally dark brown or 

 nearly black, but still showing the lighter colored spots. Hyphse mostly 

 hypophyllous fasciculate, 30—50x 4 ;^-, toothed above and subgenculate . 



