TROCHILA. 61 



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

 Sacc, Syll., 8, p. 733. 



I have followed Crouan (Flor. Finish, p. 44), iu uniting 

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

 veloped beneath the epidermis, and the distinction between 

 the two derjended mainly on the way in which the fungus 

 burst through — tearing the epidermis irregularly in Trochila, 

 and lifting it up in an entire piece in Stegia. 



Trochila craterium. Fries, Summa. Yeg. 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 fx ; 

 paraphyses cylindrical, septate, apex clavate, tinged olive, 

 rather stout. 



Gregarious. On the underside of dry ivy leaves. 



Pycnidia. Conidia colourless, continuous 8 X o-G ,u, 

 borne on colourless, cylindrical basidia. 12-15 x 6 //. 

 ( = Myxosporium paradoxum, Fckl.) 



Trochila laurocerasi, Fries, Summa, Yeg. 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 /x ; 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 J- 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 /x; paraphyses not seen. 



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



