SEI'TOCYLINDRIUM. 349 



Septocylindrium Bonordenii. Sacc. (fig. 23, p. 313.) 



AVhite, velvety, effused, thin ; conidia cylindrical, obtuse 

 at both ends, 30-40 x 4, at first continuous, then 2-4 septate, 

 hyaline; chains rarely branched. 



Septocylindrium Bonordenii, Sacc., Syll., n. 1087. 



Cylindrium septatum, Bon., Hdbk., 35, f. 16. 



On rotten leaves, especially those of the snowdrop (Galan- 

 thns means'). 



Septocylindrium elongatisporum. Sacc. 



Tufts effused, white, rather powdery ; hyphae erect, with 

 a iew minute branchlets ; conidia cylindrical, tips rather 

 acute, 1-3 septate, colourless, 15-25 x 5 p.. 



Septocylindrium elongatisporum, Sacc., Syll., iv. n. 1094. 



Septonema elongatispora, Preuss, F. Hoyersw., n. 25. 



On dead stems of mint (Mentha) and nettle ( Urtica). 



Septocylindrium pallidum. Grove. 



Conidia pale olive, 3 septate, acute at the ends, 2540 x 5-6, 

 in short, straight, simple or rarely branched chains ; hyphae 

 as long as the chains but thinner, sparingly septate, olive, 

 darker than the conidia. 



Septocylindrium pallidum, Grove, Journ. Bot., tab. 266, f. 12 ; 

 Sacc., Syll., iv. n. 1095. 



Forming pallid tufts on the ostiola of Diatrype stigma. 



The olive colour of hyphae and spores along with the well- 

 developed hyphae suggest that the present species should be 

 located with the Dematieae. 



Septocylindrium chaetospira. Grove. 



Subfasciculate or gregarious, white, chains of conidia erect, 

 spirally coiled like a corkscrew, 200-250 p high; conidia 

 becoming 3-septate, cylindrical, ends subacute, sometimes 

 curved, hyaline, 20-25 X 2-5-3 /*. 



Septocylindrium chaetospira, Grove, Journ. But., tab. 266, 

 f. 1 ; Sacc., Syll., iv. n. 1096. 



On rotten wood. 



The chains of conidia spirally coiled like a corkscrew 

 readily distinguish this species. 



Septocylindrium concentricum. B. & Br. 

 In small orbicular spots that often become confluent, every 

 part at first white, the centre changing to pale ochraceous ; 



