SPHACELIA HYMENULA. ' 47 



Hymenula, Fries, Syst. Myc., ii. p. 233; Sacc., Syll., iv. 

 p. 667. 



The black species are arranged under the genus Hymenopsis, 

 amongst the Tuberculariae dematiae. 



Hymenula constellata. B. & Br. 



Sporodochia orbicular, 1 * 5 mm. across, pallid, compact in 

 the centre, conidiophores branched, compact ; conidia 

 elliptical, 5 X 3 ,u. 



Hymenula constellata, B. & Br., Ann. Nat. Hist., n. 1590; 

 Sacc., Syll., iv. n. 3170. 



On rotten wood. 



Hymenula rubella. Fr. (fig. 18, p. 442). 



Sporodochium oblong, shining, yellowish-red, agglutinated 

 to the matrix ; conidiophores acicular, sometimes furcate, 

 20-25 x 1 /A; conidia terminal, cylindrical, ends obtuse, 

 straight or slightly curved, 5-7 X 1*5 /x, hyaline. 



Hymenula rubella, Fries, Elench., ii. p. 38 ; Sacc., Syll., iv. 

 n. 3171. 



On dead stems of Typha, Juncus, Phragmites, Carex, &c. 



Hymenula Berkeley!. Sacc. 



Sporodochium punctiform, pallid, gelatinous, dingy white 

 or pale yellow, about -| mm, diameter ; sometimes subundu- 

 late ; conidia elliptical, 5 //, long. 



Hymenula BerTceleyi, Sacc., Syll., iv. n. 3174. 



Hymenula punctiformis, B. & Br., Ann. Nat. Hist., n. 729 ; 

 Berk., Outlines, p. 291. 



On fir wood. With the habit of a small Calloria. 



Hymenula vulgaris. Fries. 



Sporodochium subgelatinous, naked, slightly elevated, 

 oblong or irregular, 2-6 mm. long, white or with a tinge of 

 blue when fresh, blackish when dry ; conidiophores erect, 

 densely crowded, very slender, colourless, simple (?), throw- 

 ing off conidia at the apex ; conidia 5-6 X 1 * 5-2 /x, obtuse 

 at both ends, colourless, very numerous, slightly curved. 



Hymenula vulgaris, Fries, Syst. Myc., iii. p. 234; Sacc., 

 Syll., iv. n. 3157. 



On rotting stems of Angelica, Urtica, &c. 



