1885.] NORRH AMERICAN RAMULARI^. 77 



15. RAMULARIA RUFO-MACULANS, Pk. 1. C. 



Spots numerous, often confluent and occupying nearly the whole leaf, 

 dull red. Hyphse very short, hypophyllous, tufted. Conidia concatenate, 

 variable, elliptical oblong or cylindrical, colorless, 8—16 x 3- 4 



Living leaves of Polygonum amphibium, var. terrestre^ Sept., Albany, 

 N. Y. (Peck), Kansas (Kellerman.) Sometimes the spots have a paler 

 or greenish yellow margin, and, when they are abundant and confluent, 

 the leaf presents a dingy red hue. v^losely allied to E. Bistortce, Fckl. 



16. RAMTJLARIA SAMBUCmA, Pk. 1. c. 



Spots small, orbicular, scattered, pallid or reddish brown, surrounded 

 by a blackish-brown border. Hyphse hypophyllous, tufted, short, irregu- 

 lar above, colorless. Conidia oblong or subcylindrical, slightly narrowed 

 at the extremities, colorless, 20—35 x 5—7 /^., sometimes concatenate, 

 rarely uniseptate. 



On living leaves of Samhucus Canadensis^ CatskillMts., Y. (Peck.) 



17. Ramularia August at a, Pk. (ined.) 



''Spots small, orbicular, sometimes confluent, pale greenish-yellow, 

 frosted beneath by the fungus. Hyphse minute. Conidia narrowly fusi- 

 form or subcylindrical, 7—10 x 2i /J-, often containing two or more nuclei. 



On living leaves of Azalea nudiflora, June." K. Y". (Peck.) 



18. Ramularia Mimuli, E. & K., Am. Kat. Kov. 1883, p. 1166. 

 Spots sujborbicular, i -i cm., with a dark, shaded border which is 



more conspicuous above. Hyphse mostly hypophyllous, subfasciculate, 

 continuous, subhyaline, 30 — 50x3/^-. Conidia cylindrical, hyaline, uni- 

 septate, 30—40 X 3 /J-. 



On leaves of Mimulus ringens^ Kansas (Kellerman.) Closely allied to 

 R. Phyteumatis, Sacc. & Winter. 



19. Ramularia Orontii, E. & M., Am. JS'at., Feb, '84, p. 189. 

 Spots large, pale brown, border darker. Hyphse epiphyllous, 30 x 3 p-, 



apices mostly bifid. Conidia hyaline, oblong with the ends subacute, 

 uniseptate, abundant, 18 x 4 p-. 



On leaves of Orontium aquaticum, ISTewfield, J. 



20. Ramularia ANDROMEDyE, E. & M., 1. c. 



Hypophyllous, forming dull white orbicular patches about 1 cm. in 

 diameter, with a red-brown spot of the same extent on the opposite 

 side of the leaf. Hyphse simple or branched, continuous, 30—40 x 3 p^ 

 Conidia oblong or cylindrical, continuous or uniseptate, 10—20 x H— 2 p. 



On leaves of Andromeda racemosa, JSTewtield, N. J. B. Vaccinii, Pk. 

 in 35th Rep., (on V. corymbosum, and V. Pennsylvanicum) does not 

 appear to us to be distinct from this. 



21. Ramularia variabilis, Fckl. Symb. p. 361. 



Spots dull brown, irregular, rather indefinitely limited (2— 5 mm.), 

 often abundant and confluent, giving the leaf a dead, withered look. 

 Hyphse amphigenous, fasciculate, simple, short (8—12 p). Conidia sub- 

 concatenate, variable, acutely elliptical, ovate, oblong or cylindrical, 8— 

 22 x3— 4/A, (18—22x3—4/^-, Sacc.) mostly (in the specimens examined) 

 less than 15 p long (8—15 p), the longer ones uniseptate. 



