357 
the branches, very rarely on the leaves, it has the usual Cytospora 
pycnidia, and its spore-mass is distinctly pinkish; this belongs 
to Valsa leucostoma Fr.; (4) resembles (3) but the spore-mass 
is white, and the tendrils are white, though they soon turn to 
a pale-amber or turbid-yellow; this belongs to Valsa ambiens 
Sacc. These suggestions are only tentative, as a basis for future 
research; longer observation will probably reduce these species 
to a smaller number. ; 
Ceuthospora Mahoniae Grove, in Journ. Bot. 1918, p. 314. 
Stromata epiphyllous, gregarious, dimorphic: (1) small, 
250 uw diam., with 1-7 chambers, truncate-conical, then erumpent 
and forming a small round whitish furfuraceous disc which 
is pierced by a central ostiole; (2) comparatively large, very 
ard, convex, prominent, solid, round or oblong, 0°5-1 mm. 
diam. or more, formed from the mesophyll of the leaf, blackish 
without, brown within, covered by the torn epidermis, then 
surrounded by it, enclosing 20-40 very minute round crowded 
loculi with white contents. Spores cylindrical, quite straight, 
obtuse above, eguttulate, 10-14 x 1°5-2 yp. 
On dead leaves of Mahonia japonica. Studley Castle, 
Warwickshire. June. 
Resembling C. Huonymi in having two kinds of pycnidia 
or stromata: (1) with many loculi; (2) with few or even a 
single loculus, the former being later in development, though 
the spores are exactly the same in both. But the larger stromata 
of C. Mahoniae are quite different from anything which obtains 
in C. Huonym. _ 
Ceuthospora phacidioides Grev. Scot. Crypt. Flor. t. 253. Cooke, 
Handb. pp. 465, 753. Sacc. Syll. iii. 277. Allesch. vi. 615. 
Died. Pilz. Brand. ix. 322. Phoma Ilicis Desm. p.p. 
Stromata of two kinds: (1) smaller, Phoma-like in appear- 
ance, but with 1-4 loculi (more or less connected) within, 
texture of wall like that of a Cytospora, splitting the epidermis 
into 3-4 triangular laciniae; (2) larger, 1-1-5 mm. diam., 
numerous, immersed, orbicular or nearly so, at first flat, 
pitch-black, shining, enclosing 3-7 closely combined loculi; 
ostiole (when perfect) in the centre of a white furfuraceous 
disc, surrounded by the epidermis which becomes raised in the 
centre to form a whitish spot, and ultimately splits into 3-5 
laciniae. Spores all alike, cylindrical, usually quite straight, 
obtusely rounded at both ends or sometimes acute below, often 
granular within, 12-20 x 2-4, issuing in a whitish tendril; 
sporophores papilliform, rather short. 
On dead fallen leaves of Ilex Aquifolium, rarely on dead 
twigs of the previous year. Very common, but the larger 
stromata are frequently sterile. The pycnidial stage of Phacidium 
multivalve K. & 8. 
Many, if not all, of our British specimens placed under 
Phoma Ilicis Desm. are the smaller pycnidia of C. phacidioides, 
the larger ones not having yet been formed on that leaf. My 
