147 
length minutely 4-guttulate; moreover Diedicke and others 
have found the Phoma and the Diplodina “ growing in company.” 
Those of the ‘‘ Sphaeropsis”’ just fill up the gap. Finally there 
does not seem to be any reason why Stagonospora Equiseti, 
Fautr., should not be considered a still further development of 
the same fungus, with cylindrical 3-septate spores, 20-25 x 4-5 p. 
They all occur on the same host, stems of Equisetum (chiefly 
EH. limosum). It may be mentioned, finally, that Phoma Equi- 
sett, Lév. (Ann. Sci. Nat. 1846, p. 282) differs from P. Equiseti, 
Desm. merely in having spores of a more ellipsoid form, but all 
the forms from round to oblong may easily be found in the same 
pycnidium, 
SPECIES TO BE TRANSFERRED TO LEPTOSTROMACEAE. 
987. Phoma donacella, Sacc. 
Contothyrium donacinum, Thiim. Contr. Myc. Lusit. no. 340. 
EPTOSTROMA DONACINUM, Sacc. Syll. iii. 642. 
L. Donacis, Sacc. in Mich. ii. 352. 
The specimen examined was one of Thiimen’s own, on dead 
culms of Arundo Donax, Coimbra (Flora lusitanica, legit Moller). 
It is obviously a Leptostroma, and there is no difference between 
it and LZ. donacinum, Sace. It should therefore stand as L. 
ponacinuM (Thiim.), Sacc.; moreover it is the same as J. 
onacis, Sacc., in Mich. ii. 352. 
Accompanying it and intermingled with it on Thiimen’s 
specimens is Gloniella microtheca, Sacc. & Speg. (Syll. ii. 768), of 
which it is doubtless the pycnidial stage. (Fig. 6a.) In this 
connection it may be added that the “ aparaphysatis (?)”’ of 
Saccardo in the description of this species of Pyrenomycete (.c.) 
can have the “(?)” deleted: there are no paraphyses. The 
ascophores are on bleached patches, and the spermogones chiefly 
on the surrounding unbleached parts. The spermatia are sub- 
cylindrical, not “ ellipsoid,” often curved as in Cytospora, and 
measure about 4 x ly. The connection between the spermogone 
and the ascophore is precisely similar to that between Lepto- 
thyrium Hederae, Starb. and Hypoderma Hederae, De Not., 
and between Leptostroma virgultorum, Sacc. and Hypoderma 
virguliorum, DC. See Journ. Bot. 1918, p. 319. 
990. Phoma viridispora, Cooke. 
PIROSTOMA VIRIDISPORUM, Grove. 
Pycnidia roundish or (when mature) oblong, up to 1 mm. 
long, more or less aggregated, sometimes in longitudinal series, 
black, covered only by the cuticle, opening by a pore; texture 
of loose round dark cells, not compacted into a pseudoparen- 
chyma. Spores fusoid, acute at both ends, eguttulate, greenish- 
olive, 9-11 x 2-5-3; sporophores linear, as long as the spore. 
(Fig. 65.) . 
B2 
