No. 60.] 
[June, 1883. 
dlmilLa, 
A QUARTERLY RECORD OF CRYPTOOAMIC BOTANY 
AND ITS LITERATURE. 
HYPOXYLON AND ITS ALLIES. 
By M. C. Cooke. 
In our last number we ventured to offer some observations on 
“ Xylaria, and its allies,” as represented in Saccardo’s “ Sylloge.” 
We proceed now to make a similar series of suggestions on the re- 
maining genera of his “ Composite Phceosporae.” Before doing so 
we will enumerate the genera, and their distinctive characters. 
Ustulina. — Stroma repando-pulvinate, thick, becoming hollow 
when old. 
Bolinia. — Stroma effused, solid, perithecia immersed, with 
rather long necks. 
Hypoxylon. — Stroma effused or subglobose, solid, perithecia 
* innate, necks hardly any. 
Daldinia. — Stroma subglobose, concentrically zoned within, 
perithecia immersed, necks hardly any. 
Nummularia. — Stroma disc-shaped, or cup shaped, adnate, 
marginate. 
All the above five genera are included in a section (b) which is 
said to have the superficial stroma carbonaceous, or coriaceous, 
with immersed carbonaceous perithecia. 
In the previous section (a) the stroma is immersed in the matrix, 
and the perithecia membranaceous. The only genus is — 
Anthostoma. — Stroma effused or limited, somewhat valsseoid. 
These features will have to be borne in mind, because, if they 
mean anything at all, fhey characterize the salient features of the 
genera. 
We should have preferred to have followed Nitschke, and merged 
Daldinia ( Hypoxylon concentricum') and Bolinia ( Hypoxylon 
tubulina) in Hypoxylon. A comparison of the above characters 
will show that the only difference in Daldinia is the concentric 
stroma, although several of the globose Hypoxyla exhibit faint 
concentric zones when in good condition. The difference in 
Bolinia is that the perithecia are immersed, with rather long necks. 
These are very slight generic differences indeed, as compared with 
10 
