356 
Sace. Syll. iii. 241.  Allesch. vi. 531. Phyllachora latitans Sace. 
Syll. ii. 610. 
Stromata amphigenous, immersed, roundish, then convex 
and erumpent, splitting the epidermis —_ four or five laciniae, 
black outside, about 0°5 mm. diam.; loculi one or several, 
immersed in the brownish stroma and athens imperfectly divided. 
Spores cylindrical, straight, obtuse at both ends or somewhat 
tapering below, 8-10 x 1°5-2 pw (12-13 X 2 yp, Sace.). 
On dry dead blackening leaves and twigs of Vaccinium 
Vitis-idaca. Shropshire; Cheviots; Ayrshire, etc. The pyc- 
nidial stage of Phacidium Vaccinii Fr. In its somewhat 
botryose pycnidia it tends outwardly towards Dothiorella. 
It is not like C. minima Cooke & Hark., on Vaccinium, U.S.A 
Distrib. Switzerland, Sweden, Finland. 
Ceuthospora Laurocerasi Grove, in Journ. Bot. 1916, p. 191. 
Sphaeria Lauri Sow. Eng. Flor. pl. 371, f. 4 (prob.), non 
S. Hederae B. Lauri Fr. Syst. Myc. ii. 521, ut dixit Grevillius. 
Ceuthospora Lauri Grev. Scot. Crypt. Flor. t. 254. Cooke, 
Handb. p. 465. Sacc. Syll. iii. 279, pro parte. Allesch. vi. 
616 (error). Non Cytospora Laurocerasi Fckl. (saltem pro 
parte 
Conceptacles or stromata numerous, amphigenous, of two 
kinds: (1) small, 0°5-1 mm. diam., obtusely conical, tending 
to be unilocular; (2) larger, up to 1:5 mm. long, hard, 
sclerotial, plurilocular or pseudolocellate, brownish-black, sur- 
mounted by the elevated leathery disc which is piereed by the 
protruding ostiole or sometimes split into 2-4 short erect 
laciniae. _ Spores sausage-shaped, obtuse at both ends, 
4-6 x 1-1°5 ww; spore-mass nearly colourless; sporophores 
crowded, filiform, slender, simple or somewhat branched, two to 
three times longer than the spore. 
On dead leaves and twigs (not branches) of Prunus Lauro- 
cerasus. England, Wales, Scotland, Ireland. Aug.—Apr. The 
form on the twigs (usually dead shoots of the foregoing summer) 
is the so-called variety ramulicola; its. pycnidia are always 
sclerotial, 1-1°5 mm. 
After long observations, I venture to suggest that there are 
on Prunus Laurocerasus four different fungi belonging to the 
genera under consideration, all having similar spores :— 
1. Ceuthospora Laurocerasit Grove. 
2. Cytospora Laurocerasi Fckl. p.p. 
3. Cytospora leucostoma Sace. 
4, Cytospora ambiens Sacc. 
Of these (1) occurs only on the leaves and small twigs; its 
spore-mass is almost colourless, its pycnidia leathery and © 
two kinds, although most are unilocular; (2) occurs on the 
larger branches, more rarely on the twigs and leaves; its spore- 
mass is almost colourless, its pycnidia are all of the smaller 
kind, and it belongs to Valsa Laurocerast Tul.; (3) occurs on 
