TROCHILA. 61 



Stegia, Fries, Obs. ii. p. 352 ; Phil., Brit. Disc., p. 398 ; 

 Sacc., Syll., 8, p. 733. 



I have followed Crouan (Flor. Finist., p. 44), in uniting 

 Stegia with Trochila. The species in both genera are de- 

 veloped beneath the epidermis, and the distinction between 

 the two depended mainly on the way in which the fungus 

 burst through tearing the epidermis irregularly in TrocJtila, 

 and lifting it up in an entire piece in Stegia. 



Trochila craterium. Fries, Summa. Veg. Scand., 

 p. 367; Phil., Brit. Disc., p. 396, pi. 12, f. 77 ; Sacc., Syll., 

 n. 2988. (figs. 39-41, p. 12.) 



Ascophore blackish, about ^- mm. across, becoming much 

 collapsed, opening by an irregularly toothed orifice ; asci 

 cylindrical, base attenuated, spores 8, irregularly biseriate, 

 broadly elliptical, ends obtuse, smooth, hyaline, 7-9 x 4-5 p. ; 

 paraphyses cylindrical, septate, apex clavate, tinged olive, 

 rather stout. 



Gregarious. On the underside of dry ivy leaves. 



Pycnidia. Conidia colourless, continuous 8 X 5-6 /JL, 

 borne on colourless, cylindrical basidia. 1215 x 6 p.. 

 ( = Myxosporium paradoxum, Fckl.) 



Trochila laurocerasi, Fries, Summa, Veg. Scand., ii. 

 p. 367 ; Phil., Brit. Disc., p. 397; Sacc., Syll., n. 2989. 



Ascophore orbicular, blackish, up to 1 ^mm. across, col 

 lapsing, epidermis splitting into 3-4 acute teeth ; asci cylin- 

 dric-clavate, spores 8, irregularly biseriate, smooth, hyaline, 

 elliptic-oblong, ends rounded, 7-12 x 4-5 p.; paraphyses 

 slender, septate. 



Gregarious, on the under side of fallen leaves of cherry 

 laurel. Phillips says the disc is yellowish when moist. 



Trochila buxi. Capron, in Cke., Hdbk., p. 768 ; Phil., 

 Brit. Disc., p. 397 ; Sacc., Syll., n. 2991. 



Ascophore minute, not more than ^ mm. across, very 

 slightly raising the epidermis, which becomes ruptured into 

 a minute toothed pore ; asci narrowly clavate, spores 8, irre- 

 gularly biseriate, elliptical, ends rather acute, hyaline, 

 smooth, 11-14 x 5 ft, ; paraphyses not seen. 



On the underside, fading or dead, of box leaves. 



