418 FUNGUS-FLOEA. 



septate, nodulose, olive, fasciculate; conidia cylindrical, 

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



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

 Syll., iv. n. 2310. 



Forming small scattered patches on tlie upper ^surface of 

 fading spinach leaves. Spots often numerous and becoming 

 more or less confluent. 



Heterosporium laricis. Cke. & Mass. 



Tufts scattered, suborbioular, woolly, sooty; threads 

 thick, septate, with the joints swollen, 16-18 yu, thick, 

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

 warted, pale fuliginous, 50-60 X 20 /a. 



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



On fading larch leaves. 



** On Monocotyledons. 



Heterosporium minutulum. C. & M. 



Torming 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 (jl. 



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



On palm leaves (Chamaerops humilis). 



Heterosporium omithogali. Klotzsoh. 



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 /i. 



Heterosporium omithogali, Klotzsoh, 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. 1946. 



On fading leaves of Ornithogalum, Oonvallaria, Smilax, and 

 other lUiaceous plants. 



