Notes on some British Pyrenomycetes. 229 
and Bresadola (Micromyc. Trident. (1889), p. 10) give IO-II x 2 
for their forma divergens. 
*V. horrida Nke. Pyr. Germ. (1870), p. 176. 
On birch poles, Sussex, Dec. IgII. 
*V. germanica Nke. l.c. p. 215. 
On birch, Sussex, Jan. 1912. Appears to be constantly distinct 
from V. ambiens in its smaller spores I0O-I5 x 3-4. 
V. decorticans Fr. Summa veg. Scand. (1849), p. 412. 
On hornbeam, Epping Forest, March 1g10. On _ beech, 
Keswick, Sept. 1922. The spores of the specimens on hornbeam 
were only I0 x 2m as compared with 10-13 x 2:5 on beech, 
but they appear to belong to one species and to be distinct from 
any form of V. ceratophora Tul. 
*Diaporthe Malbranchei Sacc. in Mich. 1 (1879), p. 509. 
On elm, Hove, Sussex, Nov. 1910. Only definitely distinct 
from D. Eves Nke. in its scarcely exserted ostiola. 
D. resecans Nke. Pyr. Germ. (1870), p. 314. 
Occurred at High Hurstwood, Sussex, both on Syringa and 
Forsythia, the two gatherings being quite indistinguishable. 
*D. vetecta Fuck. and Nke. in Fung. rhen. No. 1992. 
On box, Tumby, Lincolnshire, 1921. 
D. controversa (Desm.) Nke. in Fuck. Symb. Myc. Nachtr. I 
(1871), p. 319. Sphaeria controversa Desm. in Ann. Sci. Nat. 
Ser. 1 xVIn (1642), pi x02. 
Taking Winter’s diagnosis of Desmaziéres’ plant it is the 
common Diaporthe on ash in England and D. obscurans Sacc. 
does not seem separable. It is decidedly variable, the black line 
sometimes penetrating the wood deeply, sometimes not at all. 
The perithecia are sometimes with base immersed in the wood, 
sometimes wholly corticolous. The ostiola, however, are always 
short, thus distinguishing it from D. scobina Nke. A Diaporthe 
that I have found on Ligustrum seems indistinguishable but 
is, I suspect, Diaporthe (Euporthe) ligustrina Ell. and Everh. 
Though the sections Euporthe and Tetrastaga are convenient, 
no sharp line divides them, as experience in the field soon proves. 
Personally I consider D. controversa to occur on both Fraxinus 
and Ligustrum, even if D. ligustrina Ell. and Everh. and 
D. Ligustri-vulgaris Petrak are distinct species. 
*D. patria Spegazz. in Atti Soc. Crittogam. Ital. 111. (1881), p. 53. 
D. sorbicola (Nke.) Schroet. in Krypt-Fl. Schles. 1. 2 
(1897), p. 428. 
On Pyrus Aucuparia, Keswick, Sept. 1922. The spores were 
16-20 x 4-5, larger than those described by Schroeter and by 
Traverso. 
