1885.] 



NORTH AMERICAN GLGEOSPORIA. 



115 



Saccardo, in Miclielia, describes this species as follows : 

 "Acervuli innate-erumpeut, fuscous, pulvinate. Conidia oblong- 

 clavate, abruptly attenuated below, rounded at the apex, 10— 12x2i— 3 /^-, 

 biguttulate, hyaline. Basidia bacillary, fasciculate, 20—21 x li z^-, hya- 

 line, arising from a dark, cellulose, proligerous stratum." 



B. Spores uniseptate [Marsonia, Fisch.) 



32. GLCE0SP0RIU3I Meliloti, Trclcase. Prelim. List of Parasitic 

 Fungi of Wis., p. 16. 



Acervuli minute, inconspicuous, occurring in longitudinal rows, 2 — 5 

 mm. long, on the stem. Spores oozing out in pale, flesh-colored tendrils, 

 colorless under the microscope, oblong, straight or slightly curved, 2- 

 celled, 13 — 20 x 5 — 6 /^-. In the smaller spores the septum is nearly cen- 

 tral ; in the larger ones it is nearer one end. 



On stems of JfeZi/otws Wisconsin (Trelease.) 



33. Gl(eospokiu3I Populi, (Lib.) Mont. & Desm. Leptothyvium popu- 

 U, Lib. Gloeosporium lobes, B. & Br. G. Berkeleyi, Mont. [G. Castagnei, 

 Mont. ?) 



Spots brown, indefinite, often confluent over the greater part of the 

 leaf. Acervuli scattered, epiphyllous, pale. Spores pyriform, hyaline, 

 endochrome divided near the smaller end, 15—20 x 6—8 We have seen 

 no authentic specimens of G. Castagmi, Mont., which, see Sacc. in Mich. 

 II, p. 119, is very closely allied to this, differing only in its narrower 

 spores. The specimens in N. A. F. 1172, were referred to G. Castagnei, 

 Mont,, as the measurements of the spores agree with those given by Sac- 

 cardo in Mich., but on examining the specimens of G. PopwK (Lib.), in 

 Saccardo's Myc. Yeneta, no. 1237, we find the spores to be 15—20 x 6—8 p-. 

 The dimensions given in Michelia, I, p. 220, are 20 x 12 fj-. A. P., 1172, 

 is without doubt the same as M. Y. 1237. The specimens of G. Populi, 

 (Lib.) in our copy of Myc. Yen, 1291 are different, having larger, dark 

 acervuli and linear or subfusiform spores, 5—15 x li— 2 on stout basidia 

 10—15 X 2i y 



On leaves of Populus alba, Penn. (Martin) ; leaves of Fopulus Fre- 

 montii, Cal. (Harkness.) 



34. GiiCEOSPORiUM JuGLAi^Dis, Lib. sub. Leptothyrio, ^. A. F. 1171. 

 Spots epiphyllous, suborbicular (i cm.) dark cinerous with a rather 



indefinite border. Acervuli flattened, blackish, rugulose, 200 fJ- in diam- 

 eter, with a gray nucleus. Spores fusoid, curved, subrostrate at the 

 apex, 1-septate, hyaline, 20—25 x 5 /^-. 



On leaves of Juglans cinerea, Bethlehem, Pa. (Rau), Wis. (Trelease.) 



35. Gloeosporium J^eilli^, Hark. Bull. Cal. Acad. Feb. 1884, p. 31. 

 Epiphyllous, on small, angular, brown spots 2—3 mm. in diameter. 



Acervuli scattered, small, dark, mostly epiphyllous. Spores hyaline, 

 ovate, straight or slightly curved, obtuse, 1-septate and strongly con- 

 stricted, 15—20 x 6—8 .'J' (25—30 x 8 /->- Hark.), on crooked, subramose, fili- 

 form basidia 30—40 x 1— H /^-. 



