470 FUNGUS-FLOKA. 



SPHACELIA. Lev. (fig. 28, p. 442.) 



Sporodochium somewhat plane, effused, seated 011 a fleshy 

 or waxy basal stratum ; conidiophores short, somewhat 

 simple, rod-shaped ; conidia ovoid, single, acrogenous. 



Sphacelia, Lev., Mem. Soc. Linn., v. p. 578 ; Sacc., Syll., 

 iv. p. 666. 



Definitely known to be the conidial condition of species 

 of Claviceps and JEpichloe. 



Sphacelia segetum. Lev. (fig. 28, p. 442.) 

 Whitish, covering the surface of the young stroma of 

 Claviceps purpurea with a somewhat mealy bloom ; coni- 

 diophores rod-shaped, slightly clavate, densely packed, 

 continuous, hyaline, 912 //, long; conidia solitary at the 

 tips of the conidiophores, elliptical, hyaline, 4-6 X 2-3 p.. 



Sphacelia segetum, Lev., Mem. Soc. Linn., v. p. 578; Sacc., 

 Syll., iv. 3147. 



Covering the surface of the young stroma of Claviceps 

 purpurea, of which it is the conidial stage. Springing from 

 the ovary of various species of grass. 



Sphacelia typhina. Sacc. 



Waxy, pale flesh-colour, encircling the leaf-sheaths or 

 stems of grasses for a space of 1-2 in. as a continuous, thin, 

 crustaceous layer; conidiophores 20-24 x l'5-2 //., rod- 

 shaped, slightly attenuated upwards; conidia acrogenous, 

 ovoid, 4-5 x 3 p., hyaline. 



Sphacelia typhina, Sacc., Mich., ii. p. 297 : Sacc., Syll., iv. 

 n. 3150. 



On the leaf-sheath or rachis of various grasses, Dactylus, 

 Holcus, Triticum, &c. 



The conidial condition of Epichloe typhina. 



HYMENTJLA. Fr. (fig. 18, p. 442.) 



Sporodochium disciform, regular, brightly coloured; 

 conidia borne at the tips of simple or rarely "forked coni- 

 diophores. 



