I8S5.] 



NORTH AMERICAN CYLINDROSPORIA. 



127 



white lines or stride, i — 1 cm. long, on each side of which the leaf is 

 sliu'litly discolored. 



On living leaves of Vemtrum viride, Adriondac Mts., JST. Y. (Peck). 



2. Cyltndrospokium Scrophulari^, S. & E., Mich. II, p. 575. 

 Spots minute, white with a broad, discolored margin. Acervuli 



small, subepidermal. Conidia filiform, curved, 30 — 40 x li— 2 3-nucle- 

 olate, becoming 1— 3-septate, hyaline arising from a slender, vaguely 

 branched mycelium . 



On leaves of Scropliularia nodosa, Pennsylvania (Martin), Illinois, 

 (Hart.) Septoria Scrophularia, West, occurs on the same spots and has 

 spores much like those of the Cylindrosporium only narrower (1 /^-), and 

 usually more or less bent. 



3. Cydindrosporium microspilum, Sacc. & Winter, Miscellanea 

 Mycologica, p. 16. 



Spots circular, very small, white with a narrow, dark margin. Acer- 

 vuli innate, amphigenous, punctiform, pale. Conidia bacillary, some- 

 what curved, rounded at each end, 50 — 60 x4 /^-, spuriously 4— 6-septate, 

 hyaline. 



On oak leaves, Missouri (Demetrio). 



4. Cylindrosporium Glycyrrhiz^, Hark., Bull. Cal. Acad., Feb. 

 1884, p. 32. 



Hypophyllous, covering nearly the whole surface of the affected leaf- 

 lets, oozing out in tendrils. Conidia cylindrical, attenuated at each end, 

 with several vacuoles, 40—70 x 4—5 fj^ . 



On living leaves of Glycyrrhiza lepidota, Sunol, Cal. (Harkness.) 



5. Cylindrosporium Gei, Farlow. Appalachia, vol. Ill, p. 250. 

 Spots small, distinctly limited. Hyphse hyaline, amphigenous, very 



numerous from a dense, subparenchymatous mass of threads, making 

 their way through the stomata, forcing apart the closing cells, slender, 

 about 75—115 long, scarcely 3 in diameter, simple or branching, end- 

 ing in very long (80—110 /^-) filiform, hyaline conidia, which are straight 

 or irregularly bent. 



On leaves of Geumradiatum, var. Peckii, White Mts., ]Sr. H. (Farlow). 



6. Cylindrosporium Kubi, Ell. & Morgan, n. s. 



Spots amphigenous, brownish-gray and definite above (2 3 mm.), 

 sometimes confluent, nearly concealed below by the tomentum of the 

 leaf. Acervuli epiphyllous, punctiform, subcutaneous, then suberum- 

 pent, pale. Spores filiform, narrower at one end, nearly straight or more 

 or less curved, 3— 5-(mostly 3-) septate, hyaline, 40—55 x 2i p- at the 

 thickest part. Hyphse rudimentary and obscure. 



On living leaves of Bubus strigosus (cult.). Wis. (Dr. J. Brown. ) 



7. Cylindrosporium circinans, Winter, n. s. 



Acervuli epiphyllous, large, applanate, generally circinately or con- 

 centrically crowded, more rarely irregularly gregarious, rotundate-angu- 

 lar or irregular, often confluent, forming brownish or dirty gray circles 



