PLcell.aph. 7. PROTOMYCEiE. 161. Stilbospora. 54-5 
XI. 161. STILBOSPORA. Persoon. Stilbospore. 
Sporidia dark-coloured, ringed, in irregular heaps. 
1. Stilbospora asterosperma . Star-seeded stilbospore . 
Sporidia starlike, 3 or 4-rayed. 
Stilbospora asterosperma, Persoon Syn. 96. 
On the branches of beech, birch, and maple-trees. 
2. Stilbospora sphcerosperma . Round-seeded stilbospore . 
Sporidia globular, minute. 
Stilbospora sphasrosperma, Persoon Syn. 9T. 
On the dry stems of the common bankside reed. 
C. Xylomide.®. Sporidia budlike, enclosed in a crust; 
crust swollen, variable in shape; inside pale; texture ir- 
regular, cellular, under the epidermis of plants. 
XII. 162. XYLOMA. Persoon. Xyloma, 
Crust hard, inside fleshy, cellular. 
1 . Xyloma salicinum . Willow xyloma. 
Crust black, shining, thick ; inside granular, white. 
Xyloma salicinum, Persoon Syn. 103. 
On willow-leaves. 
Solitary, bossed. 
/3. confluens. Crust confluent, disk naked. 
2. Xyloma acerinum . Maple xyloma . 
Crust black, flat, surface rather unequal with winding 
lines. 
Xyloma acerinum, Esenbeck Syst. 2, 5. 
Xyloma punctatum, Persoon Syn. 104. 
On the leaves of maple and sycamore-trees. 
Aggregate, orbicular. 
/3. confluens. Crusts confluent. 
Xyloma acerinum, Persoon Syn. 104. 
3. Xyloma leucocreas. White-flesh xyloma . 
Crust thick, tubercular; inside white. 
Xyloma leucocreas, Be Cand. Syn. 63. 
On the leaves of different species of willow. 
VOL. i. 2 N 
