344 BRITISH DISCOMYCETES. 
Name—Rhabarbarum, another name for Rhewm, the 
genus to which rhubarb belongs. 
King’s Lynn! (Mr. C. B. Plowright). Hencott, neai 
Shrewsbury ! 
9. Dermatea Fagi (nov. sp.). 
Erumpent, the orbicular or elliptic groups 1 to 8 lines 
across, splitting the epidermis; cups plane or slightly 
convex, mostly immarginate, when moist orange-yellow, 
when dry ferruginous-yellow, pruinose, densely crowded 
on an evident stroma; stem when present stout, con- 
tinuous with the stroma; asci broadly clavate; sporidia 
&, elliptic or oblong-elliptic, filled with coarsely grained 
protoplasm, sometimes becoming muriform, 18—23 x 9— 
12u; paraphyses slenderly filiform, abundant. 
Stylospores oblong-elliptic or elliptic, 1O—20 x 7—9n; 
produced on the surface of the stroma in tufts between 
the cups on clavate sporophores. 
On Fagus sylvatica. 
The cups are + to 4 a line broad. The conidia are 
produced in such a quantity as to form a pale stratum 
visible under a pocket lens. I am not aware that they 
have been observed in any other species. 
Name—From the tree on which it grows. 
Kingcausie, near Aberdeen! 1886. 
Genus II].—Cenaneium. Fries. 
Receptacle closely shut, at length more or less open, 
marginate, with a thick epidermis of a different colour ; 
hymenium even, persistent; asci cylindraceo-clavate; 
sporidia 8, elliptic, oblong, fusiform or filiform. 
Pyenidia immersed, conical, unilocular; stylospores 
ovate or slenderly fusiform, (Plate X. fig. 66.) 
_. The receptacles are erumpent, sessile or subsessile ; 
their exterior coriaceous or membranaceous, the interior 
es grumous. Pycnidia have not been observed 
in a 
