242 MICROSCOPIC FUNOI. 



flexuose, and bent upwards. — On leaves of Lycopsis arvensU. 

 Bhere. October, 1865. (J)r. Capron.) 



Erysiphe tortilis, Lk. Cobnel Blight ; hypopbyllous ; 

 mycelium web-like, effuse, evanescent; conceptaoles minute, glo- 

 bose ; appendages ten times as long, free from the mycelium, 

 flexuose ; sporangia 4, ovate, rostrate, with 4 spores. — Oa leaves 

 of the common Dogwood. Autumn. Frequent. (Plate Xll. 

 figs. 245, 24R.) 



Erypsiphe communis, Sclil. Buiteectjp Blight ; hypo- 

 pbyllous ; mycelium effuse, web-like, evanescent or persistent ; 

 conoeptacles minute, globose, scattered or gregarious ; appendages 

 short; sporangia 4-8, ovate, rostrate, with 4-8 spores. — On leaves 

 of various RanunculacecE, Leguminosa, and other plants. Autumn. 

 Very oom.mon. (Plate XII. figs. 240-242.) 



Ch^tomium, Kze. 



Perithecium thin, brittle, mouthless ; sporangia linear, eontain- 

 ing dark lemon-shaped spores. Berk. Otitl., p. 405. 



Chsetomium elatum, Kze. Straw Beistle -Mould ; 

 perithecium sub-ovate, base radiato-fibrose, hairs of the vertex 

 verjf long, interwoven, branched; spores broadly elliptic, apioulate 

 at either end. — On mouldering straw, reeds, matting, &c. Very 

 common. (Plate XII. figs. 257-259.) 



Chsetomium chartarum, Ehb. Paper Beistle-Mould ; 

 perithecium subglobose, black, surrounded by a bright-yellow 

 spot; spores subglobose.— On paper. Stibbington, Hants. Rare. 

 (Plate XII. figs. 252, 253.) 



Chsetomium. glabrum, B. Perithecia subglobose, smooth; 

 asci linear ; sporidla globose, uniseriate, smooth. — On straw, in 

 company with Lycogala parietinum, of which, it is probably a 

 condition. "It grew abundantly on straw, and differed from 

 CiuBtomium elatum in being perfectly free from hairs." — (M. J. B.) 

 — On damp straw. 



Chsetomium funieolum, Cooke. Twine Bristle-Mould , 

 perithecia scattered, sub-ovate, black ; hairs of the vertex very 

 long, dichotomous or simple, erect, slender, acute, black ; sporidia 

 lemon-shaped, dingy brown. — On twine suspended in a vessel 

 containing water at the British Museum. 



This species is most closely allied to C. elatum, but much 

 smaller and neater. It is wholly black, and without the fibrous 



