Rev. M. J. Berkeley and Mr. C. E. Broome on British Fungi. 97 



Extremely minute and delicate pure white. Hyphasma creep- 

 ing, but very sparing. Fertile flocci erect, even. Heads glo- 

 bose or somewhat obovate, beautifully areolate. Spores minute 

 elliptic. 



Differing from the last in colour and the simple straight fer- 

 tile flocci : the heads are somewhat larger. 



Plate V. fig. 3. a. Fertile threads magnified, springing from the de- 

 cumbent mycelium ; b. fertile head more highly magnified, to exhibit the 

 reticulated structure. The thread in this case shows a tendency to become 

 proliferous, c. S])ores. 



BoLACOTRICHA, U. g. 



Fills simplicibus apice cirrhiformibus articulatis ; sporis magnis 

 globosis brevissime pedicellatis conglomeratis, endochroniate di- 

 stinctissime granulato. 



506. B. grisea. On dead cabbago stalks, old mats made of 

 Typha, &c.. King's Cliffe, 1839, 1841. 



Tufts resembling strongly those of Myxotriclium cliartarum, 

 but rather larger, forming large effused gray patches. Threads 

 thicker at the base, flexuous, pale purple under the microscope, 

 strongly curved at the tips like little tendrils, sparingly articu- 

 late at irregular distances or perfectly continuous. Spores con- 

 glomerate, large, 5-8 times as broad as the threads, globose ; 

 episporium thin ; endochrome strongly granulated. 



This fine species has exactly the habit of Myxotriclium, but is 

 very different in its simple threads and large spores. It does 

 not accord with the characters of any known genus. The spores 

 are not concatenated as in Sporodum, nor minute and linear as 

 in Tricholeconium. We place it for the present near Myxotrichum, 

 though not quite sure of its nearest affinities. 



Plate V. fig. 4. a. Tuft magnified; b. thread and spores highly mag- 

 nified. 



507. Helminthosporium Srnithii, n. s. Csespitibus spongiosis; 

 fills simplicibus flexuosis ; sporis longissimis, endochromatibus 

 diametro subfequalibus episporio communi crasso. On holly bark 

 and wood, Wareham, Rev. W. Smith. 



Tufts effused when growing on the wood, linear, and often 

 forming somewhat reticulate erumpent patches when produced 

 on the bark, rather spongy, coarsely velvety. Threads simple, 

 flexuous, articulated ; articulations irregular, several times as long 

 as broad. Spores terminal, extremely long, linear, multiarticu- 

 lated, sometimes bent or flexuous. General episporium double, 

 the outer coat thin, the inner extremely thick. Endochromes 

 united, about as long as broad, sometimes moniliform or very 

 irregular, here and there surrounded by a broad cavity, which 

 appears granular under the microscope. 



Ann. S^ Mag. N. Hist. Ser. 2. Vol. vii. 7 



