OVULABIA. 321 



fertile hvphae erect, simple, not septate, aggregated ; 

 conidia elliptical, cream-coloured, 15 p, long, in short chains 

 of two or three, terminal upon the hyphae. 



Rumularia destructive/,, Phill. & Plow., Grev., vi. p. 23, t. 94, 

 f. 1 ; Sacc., Syll., iv. n. 962. 



On Myrica gale. When it occurs upon the smaller branches 

 it is in the manner of an encircling zone 1-3 cm. wide, which 

 quickly causes loss of vitality of the parts beyond, very 

 much in the same manner that RJiytisma maxima does. It 

 also occurs on the under surfaces of the leaves, upon reddish- 

 brown spots. (P. & P.). 



Ovularia senecionis. Mass. 



Tnfts white, conspicuous, irregular; hyphae erect, septate, 

 v/avy, slender ; conidia cylindrical, ends rounded, con- 

 tinuous, 7-18 X 5 p, colourless. 



Ramularia senecionis, Sacc., Syll., iv. n. 1023. 



Ctjlindrosporium senecionis, B. & Br., Ann. Nat. Hist., 

 n. 1G13. 



On leaves of Senecio vulgaris. 



Ovularia lactea. Mass. 



Spots subcircular, whitish, bounded by a brownish 

 margin; hyphae rather wavy, 3060 x 2 /*,; conidia variable, 

 elliptic-oblong, fusoid, or cylindrical, both ends obtuse, 

 8-11 x 2-3 /A, colourless, in short chains. 



Ramularia lactea, Sacc., Mich., ii. p. 549 ; Sacc., Syll., iv. 

 n. 979. 



On upper surface of living leaves of Viola liir'a t V. 

 odorata, &c. 



Ovularia armoraciae. Mas?. 



Spots irregular in form and size, often numerous, sub- 

 oohraceous then pale; hyphae subfasciculate, springing from 

 a prostrate mycelium, without septa, simple or rarely with 

 ;m indication of branching; conidia elongated, cylindrical, 

 both ends obtuse, colourless, 15-25 x 2-5-3 /* (or accord- 

 ing to Fuckel, becoming subventricose, and measuring 

 22 x 5 fji). 



Ramularia armoraciae, Fold., Svmb. Myc., p. 361, t. i. 

 f. 24 ; Sacc., Syll., iv. n. 978. 



On leaves of horse-radish. 



