382 PROCEEDINGS OF THE ACADEMY OF [1894. 



Hypophyllous, forming small (1—2 mm. ), olive-black, orbicular 

 patches scattered over the lower side of the leaf. Hyphiv? subfascicu- 

 late-etfused, pale yellowish- browu, coutinuous or sparingly septate, 

 70-80 X 4—5:j., geniculate-subimdulate, slightly swollen at the tips. 

 Conidia oblong-elliptical, 1-2-septate, pale yellowish, echiuulate, 15- 

 27 X 10-12//. 



Heterosporium oladosporioides E. & E. 



On brown paper exposed by the roadside, Ann Arbor, Mich., 

 May, 1894 (L. N. Johnson, No. 1,599). 



Maculiform. Hypha; erect, subfasciculate, brown, 90-110x4- 

 5 ', septate, subundulate or subnodulose above. Conidia terminal, 

 hyaline and continuous at first, then pale brown and minutely 

 echiuulate, 1-2-septate, 10-16 x 5-7// not constricted. 



The hyphaj form small black scattered patches about 2 mm. diam. 



Heterosporium Triliii E. & E. 



On leaves (partly dead) of Trillium ovatum, Latah Co., Idaho, 

 July, 1893 (C. V. Piper, No. 128). 



Spots at first suborbicular, gray with a whitish margin, soon con- 

 fluent, overrunning and killing the leaves, which then become rusty 

 brown. Hyphty fasciculate, short, 30-50 x 5-6//, variously toothed 

 and shouldered above and more or less crooked, sparingly septate. 

 Conidia oblong-cylindrical, 12-30 x 5-8//, 1-3-septate, minutely 

 echiuulate, yellow-brown. 



Maorosporium hybridum E. & E. 



On bark of decaying Sambucus glauca, Pullman, Wash., Oct. 

 1893 (C. V. Pipe.r, No. 151). 



Forming black, subelongated patches or irregularly scattered. 

 Hyphte cespitose, olive-brown, coarse, 100-110 x 6-7/', geniculate 

 and subtorulose above, finally closely septate. Conidia variable; 

 at first oblong-elliptical and mostly uniseptate, 8-15 x 5-7//, pale 

 yellowish- brown, then oblong, 2-3-septate and constricted, granular, 

 12-25 X 8-12//. Other conidia are globose, 12—15;/, sarcinuliforra, 

 with two septa crossing each other at right angles, others again 

 broad-clavate, 5— 9-septate and muriforra, 50-70 x 12-15//. 



The members of this genus are so variable that we have ventured 

 to describe onl}'^ forms with marked and recognizable characters. 



Maorosporium iridicolum E. & E. 



On leaves of Iris Missouriensis, Moscow, Idaho, May, 1894 

 ( Prof L. F. Henderson, No. 2,640). 



