418 FUNGUS-FLOEA. 



septate, nodulose, olive, fasciculate ; conidia cylindrical, 

 olive, 1-3-septate, minutely warted, 15-35 x 6-10 /j.. 



Heterosporium variabile, Cke., Grev., v. p. 123 ; Sacc., 

 SylL, iv. n. 2310. 



Forming small scattered patches on the upper surface of 

 fading spinach leaves. Spots often numerous and becoming 

 more or less confluent. 



Heterosporium laricis. Cke. & Mass. 



Tufts scattered, suborbicular, woolly, sooty; threads 

 thick, septate, with the joints swollen, 15-18 p. thick, 

 conidia 1-3-septate, elliptical, obtuse at the ends, minutely 

 warted, pale fuliginous, 50-60 X 20 p.. 



Heterosporium lands, C. & M., Grev., xvi. p. 80. 



On fading larch leaves. 



** On Monocotyledons. 



Heterosporium minutulum. C. & M. 



Forming velvety, dark olive patches of variable size 

 and form; threads somewhat fasciculate, short, flexuous, 

 sparingly septate, pale olive ; conidia 1 2-septate, elliptical, 

 rounded at the ends, not constricted, pale olive, epispores 

 rough, 16-20 x 6-8 p.. 



Heterosporium minutulum, Cke. & Mass., Grev., xvi. p. 11. 



On palm leaves (Chamaerops Jiumilis). 



Heterosporium ornithogali. Klotzsch. 



Forming broadly effused, olive, cloudy spots on the upper 

 surface of leaves ; fertile hyphae erect, simple or rarely 

 branched, septate, nodulose, olive, often flexuous, 100-250 x 

 8 X 14 /A, fasciculate, originating from a basal aggregation 

 of hyphal cells resembling . a minute sclerotium ; conidia 

 olive, cylindrical, 1-5-septate, very minutely warted, 

 25-90 X 8-14 p.. 



Heterosporium ornithogali, Klotzsch, Herb. Myc., i. n. 69 ; 

 Cke., Grev., v. p. 123; Sacc., Syll., n. 2311. 



Helminthosporium exasperatum, B. & Br., Ann. Nat. Hist., 

 n. 1380, t. 7, f. 4; Sacc., Syll., n. 1945. 



On fading leaves of Ornithogalum, Convallaria, Smilax, and 

 ether liliaceous plants. 



