10 
look like a row of little voleanoes; the extruded spore-masses 
become deep amber in colour. — 
Distrib. Europe, North America, India. 
Cytospora populina Rab. (Naemospora populina Pers. Sacc. 
Syll. iii. 747; Allesch. vii. 541) assumes a larger and clumsier 
form; itis said to have larger spores (8x 1-5 y), and to belong to 
Valsa populina Sacc., but it is not known as British. 
C. cincta Sacc. Syll. iii. 254. Allesch. vi. 593. Died. p. 356. 
Stromata aggregated, rather large, pustular, usually trans- 
versely erumpent, often with a number of perithecia surrounding 
the single central pycnidium; disc dingy-white or even brownish, 
mostly with a single ostiole; loculi of pycnidium one or few, 
rarely numerous and more or less radiating. Spores 6-8 (4-9) X 
1-5-2 p, issuing in pale reddish tendrils; sporophores filiform, 
slender, usually simple, 10-15 x1 yp, rising from a thick brown 
Oe ec wall. 
On Prunus Cerasus, P. domestica, P. spinosa. Near Cam- 
bridge, Sutton Coldfield, and other places, but the Saami 
were all ill-developed. Spring. The spermogone of Valsa 
cincta Fr. 
This species is common in aceaitchy and a variety is recorded 
on Pyrus. When fully developed, it is easily recognised by its. 
ring of protruding perithecial ostioles on the disc, surrounding a 
central one belonging to the pycnidium. The mature stroma may 
measure as much as 2-3 mm. in diameter. Diedicke records 
it on Prunus Padus 
Distrib. France, Holland, Germany, Sweden. 
C. clypeata Sacc. Syll. iii. 252. Allesch. vi. 600. Died. p. 360. 
Pycnidia scattered or sometimes in short longitudinal rows, 0-5 
—1 mm. diam., at first globose, bullate, covered, then splitting the 
epidermis longitudinally, at length conical, shining-brown outside, 
emergent and showing a small round dingy disc which finally 
becomes black and hard by the formation of a little dark mass of 
dense shining subcarbonaceous tissue around the ostiole of the 
subunilocular pyenidium; walls of pycnidium firm, rather thick, 
and brownish olive, of mixed parenchyma and prosenchyma. 
Spores about 61; sporophores filiform, 10-15 x 
n dead branches of Rubus fruticosus. praanae and Kings- 
wood, near Birmingham. Mar.—Apr.. The pyenidial stage of. 
Valsella clypeata Fckl. These specimens agree with ao 
Mycoth. germ, no. 1709! 
Distrib. Holland, Germany. 
C. Curreyi Sacc. Syll. iii. 269. Allesch. vi. 573. Died. p. 330. 
Lind, in Annal. Mycol. 1907, v. 275. 
Stromata conico-truncate or almost hemispherical, with a 
round or rarely oval base, 1-1-5 mm. diam., very protuberant, 
covered at the sides by. the adherent stellately cleft periderm, 
with a dingy-brown disc provided with a single central papilla 
