BRITISH SPHiEROPSIDEiE . 
107 
576. Leptostroma spiiraeae, Fr. Sacc. Syll. 3440. 
On Spiraea ulmaria. Forden ; Southgate ; King’s Cliffe ; 
Berwick ; Perth ; Appin ; Baldovan. 
Gen. 5. LABRELLA, Fr. Sacc. Syll. hi., 647. 
Perithecia innate, often spurious, black, rounded or unequal, 
dehiscing with a fissure. Sporules oblong, fusiform, or globose, 
continuous, hyaline. 
577. Labrella coryli (Bob.), Sacc. Syll, 3453. 
On hazel leaves. Highgate (F. B. i., 154) ; Swanscombe. 
Gen. 6. DISCOSIA, Lib. Sacc. Syll. ill., 653. 
Perithecia dimidiate, disciform, subsuperficial, soon falling away, 
black, often shining, astomous or ostiolate, membranaceous. Spo- 
rules oblong, allantoid, two or many septate, often three septate, 
with a cilium at each end, hyaline. 
578. Discosia artocreas ( Tode .), Sacc. Syll. 3485. 
On leaves, Fagus, &c. Shere ; Perth. 
579. Discosia alnea ( Pers .), Sacc. Syll. 3486. 
On alder leaves. Appin ; Edinbro’. 
Gen. 7. ACT1NOTHYRIUM, Kunze. Sacc. Syll. III., 658. 
Perithecia dimidiate, clypeate, rather fugitive, not, or scarcely 
gaping, membranaceous, with a radiating fimbriate margin. 
Sporules filiform, hamate, hyaline. 
580. Actinothyrium graminis, Kunze. Sacc. Syll. 3507. 
On grasses. Shere ; Appin. 
Gen. 8. LEPTOSTROMELLA, Sacc. Syll. hi., 659. 
Perithecia covered by the epidermis, then subsuperficial, elon- 
gated, depressedly convex, somewhat carbonaceous, black, splitting 
with a more or less manifest longitudinal fissure. Sporules rod- 
like or filiform, continuous or septate, hyaline. 
581. Leptostromella juncinum, Fr. Sacc. Syll. 3516. 
On rushes. Norfolk (F.B. i., 433) ; King’s Cliffe ; Leicester. 
582. Leptostromella pteridina, Sacc. Syll. 3517. 
On Pteris. Shere. 
Fam. 4. EXCIPULACE^E, Sacc. Syll. hi., 664. 
Perithecia cup-shaped, or patellate, or excipuliform, or hysteri- 
form, at first somewhat spherical, but soon broadly open, mem- 
branaceous or carbonaceous, black, erumpent or superficial, smooth 
or hairy. 
Gen. 1. EXCIPULA, Fr. Sacc. Syll. ill., 665. 
Perithecia innato-erumpent, excipuliform or cup -shaped, mem- 
branaceous or rather coriaceous, black, smooth, with an entire 
orbicular mouth. Sporules oblong or elongated, continuous, 
hyaline. 
583. Excipula petiolicola, Fckl. Sacc. Syll. 3526. 
On petioles of Tilia . 
