Rev. M. J. Berkeley on British Fungi. 435 
which divide them into three very unequal articulations. This 
species is clearly new, differing from all in the very remark- 
able form of its sporidia. 
Tas, XIII. fig. 19. a, H. obovatum, 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 umbelliferee. 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. 
Tas. XIII. fig. 20. a, H. delicatulum, nat. size ; b, flocci and sporidia ; 
a portion of one of the flocci ; d, sporidia. All more or less highly magnified. 
*234. Dematium hispidulum, Fr. Syst. Myc. vol. i. p. 366. 
Sporodum conopleoides, Corda, fasc. ui. 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 concinnum, n. 8s. Helminthosporium 
strieforme, 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. 
Tas. XII. fig. 21. a, M. concinnum, nat. size; 5, flocci and sporidia; c, 
a sporidium germinating; d, sporidia in various stages of growth. All more 
or less magnified. 
C, 
2 
