386 OUTLINES OF BRITISH FUNGOLOGY. 



length rigid ; perithccia ovate^ furnished with a short neck. 

 (Plate 24, fig. 3.) 



On rotten trunks. Common. 



2. H. nummularium, Bull. ; determinate, quite plane, ex- 

 ternally and internally black ; perithccia immersed, ovate ; 

 ostiola globose, slightly prominent. — Bull. t. 468./. 4. 



On wood and bark. Not common. 



3. H. luteum, Fr. ; orbicular, cup-shaped, black ; disc bor- 

 dered, wrinkled ; stroma yellow, pulverulent ; perithccia in 

 many rows, emergent: {no. 170.) 



On elder. Rare. 



4. H. succenturiatum, Fr.; oblongo-pulvinate, immarginatc, 

 even, black, greyish-brown within; perithccia ovate, scattered, 

 irregularly emergent : {no. 830.) 



On oak-branches. Rare. 



5. H. gastrinum, Fr.; ventricose, erumpcnt; stroma pallid; 

 perithccia scattered irregularly, necks included; disc nearly 

 plane, black: [no. bS)^.)—Sow. t. S7i.f. 9. 



On elm. Not uncommon. 



b. Fulvhiatce. 



6. H. eoncentricum, Grev. ; large, subglobose, brownish, 

 at length black, concentrically zoned within. — Boll. t. 180; 

 Sow. t.im-, Grev. t. 324. 



On old ash-trees. Common. 



7. H. coccineiim, Bull. ; globose, vermilion-brown, bright 

 black within; perithccia ovate; ostiola at length prominent. — 

 Grev. t. 136; Sow. t. 374. 



On beech, etc. Very common. 



8. H. multiforme, Fr. ; irregular, at first rugose, rusty- 

 brown, at length naked, black, cinereous- black within; peri- 

 thccia at length prominent, papillate. (Plate 24, fig. 4.) — 

 Sow. t. 355: Grev. t. 114. 



