SPH^RIACEI. 893 



On Clematis vitalha. Batheaston. 



Scattered beneath the cuticle, subglobose, collapsed when dry ; asci oblong, 

 varying in form according to the pressure of the sporidia ; sporidia ("0015 in.) 

 •035 m.m. long, clavate, triseptate, the upper articulation hyaline, the three 

 following brownish, often containing a globose nucleus, appendage, or fifth 

 articulation hyaline, gradually tapering or constricted near the tip. Very 

 rarely there are four brown articulations. — B.<kBr. 



2681. Sphaexia taxnaricis. Chev. " Tamarisk Sphaeria." 



Scattered under the epidermis, wliicli is very convex and rup- 

 tured in the centre ; mouth very short, obtuse, not exserted ; 

 sporidia rather dark brown, triseptate, slightly curved. — Grev. t. 

 45. Eng.Fl. v. p. 270. Curr. Linn. Trans, xxii. t.68,f. 81. 



On dead branches of Tamarisk. 



Perithecia globose, slightly depressed , their black colour appearing through 

 the epidermis.— J/.J'.B. Sporidia ('0008 in.) "02 m.m. long. 



2S82. Sphaeria eustegia. Cooke. " Collapsing Willow 



Sphaeria."' 



Perithecia scattered, subglobose, then depressed ; ostiola ele- 

 vating and piercing the cuticle, at length collapsing, and resem- 

 bling a Stegia; asci cylindrical; sporidia uniseriate, fusoid, mostly 

 triseptate, sometimes with 4 or 5 septa, occasionally one of the cells 

 is transversely divided, pale brown. — Cooke exs. no. 387. Valsa 

 tetratrupha. var. simplex, Seem. Journ. Bot. (1866). t. f. 20. 



On willow twigs. 



26S3. Sphaeria abbreviata. Coohe. " Short saccate Sphaeria." 



Pycnidia. — Perithecia commonly scattered over bleached 

 spots, small, black, and prominent, covered by the epidermis ; 

 stylospores elliptical, triseptate, brown, slightly constricted at 

 +he septa. — Hendersonia roscB, Westendorp Bull. De Brux. ii. no. 

 ^. Cooke Seem. Journ. (1866). no. 36. 



AscoPHORE. — Perithecia minute, in short parallel lines, con- 

 vex, papillate, at length perforated ; asci short, broadly elliptic ; 

 sporidia crowded, oblong, triseptate, torulose, brown. — Cooke 

 Seem. Journ. (1866) iv. ^45,/. 6. 



On dead stems of bramble. Jan. — April. 



Forming distinct, and visible, short parallel lines, but not confluent ; asci 

 very short and broad, elliptical, pyriforra or obovate ; sporidia crotvded to- 

 gether, oblong, triseptate, slightly torulose, pale brown when mature; the 

 linear disposition of the perithecia forming short lines of black dots, and the 

 short, broad nearly obovate asci are very characteristic. The stylosporous 

 form often accompanies the ascigerous. 



