Rev. M. J. Berkeley on British FtmffL 



435 



which divide them into three very unequal articulations. Tin's 

 species is clearly new, differing from all in the very remark- 

 able form of its sporidia. 



Tab. XIII. fig. 19. a, H. obovaluni, nat. size; b, flocci and sporidia; c, 

 a single sporidium, very highly magnified. 



233. H. delicatulum, n. s. Tenuissimum ; filis subulatis 

 multi-articulatis ; sporidiis oblongis, obtusis, 4 — 5-septatis, 

 pellucidis ; articulis interdum septo verticali instructis. On 

 stems of umbelliferae. King^s Cliffe. 



Forming very delicate soft patches of scattered filaments, 

 presenting to the naked eye a cloudy black spot. Flocci very 

 slender, subulate, multi-articulate, brown, paler at the tips. 

 Sporidia nearly colourless, oblong, with the apices very ob- 

 tuse, consisting of about five swollen articulations, one or two 

 of which have occasionally a vertical dissepiment. 



Tab. XIII. fig. 20. a, H. delicatulum, nat. size ; b, flocci and sporidia; c, 

 a portion of one of the flocci ; d, sporidia. All more or less highly magnified. 



*234. Dematium hispidulum, Fr. Syst. Myc. vol. hi. p. 366. 

 Sporodum conopleoides, Corda, fasc. hi. tab. 1. fig. 22. On 

 dead grasses. Common. An excellent figure of this plant is 

 given by Corda under the name quoted above, but he does not 

 refer to Dematium hispidulum. From the middle of the flocci 

 spring one or two obovate joints, which support two or three 

 rows of sporidia, of which those at the apices are the largest. 

 We have, therefore, something like the structure of Penicil- 

 lium, but the plant belongs to a different series, and the ge- 

 nus of Corda is probably a good one. It is quite certain that 

 Fries' s genus Dematium, as it at present stands, cannot be re- 

 tained, but it is well to be cautious about making new genera, 

 where the affinities are obscure, and till all the species, or at 

 least the greater part of them, have been correctly observed. 



235. Macrosporium continuum, n. s. Helminthosporium 

 striceforme, Corda, fasc. 1. p. 13. Maculis pulverulento-velu- 

 tinis, nigris ; floccis flexuosis, articulatis, fuscis ; sporidiis 

 obovatis, pedicillatis, demum oblongis. On the decorticated 

 twigs of an old hamper made of some species of ozier. Ape- 

 thorpe, Sept. 1840. 



Spots elongated black. Flocci minute waved, brown below, 

 pellucid above, often with the rudiment of a branch at the 

 apex. Sporidia obovate, with about three principal dissepi- 

 ments, which are divided vertically or obliquely ; furnished 

 with a very short pellucid peduncle. This peduncle at length 

 vanishes, and they lose their obovate form and become oblong. 



•Tab. XII. fig. 21. a, M. concinnum, nat. size; b, flocci and sporidia; c, 

 a sporidium germinating; d, sporidia in various stages of growth. All more 

 or less magnified. 



2 f 2 



