Davis—North American Ascochytae 
667 
constricted, 15-18 x3-3 y 2 fi. On leaves of Sambucus nigra 
aurea, 
55 Ascochyta silenes Ell. & Evht. 
Jonrn. Mycol. 5:148. 
Spots pale yellowish, the entire leaf finally assuming the same 
color, the spots, which are then hardly discernible becoming 
paler; pycnidia not confined to the spots but scattered over the 
entire leaf, erumpent, discoid, broadly ostiolate, 120-150/a; 
sporules hyaline, oblong, rounded at the ends, becoming 1- (1-2) 
septate, 10-14 x 2y 2 -~3^. On leaves and stems of Silene antir- 
rlnina. 
56 Ascochyta sisymbrii Ell. & Kell. 
Journ. Mycol. 5:142. 
Immaculate; pycnidia amphigenous, scattered, innate, black, 
depressed-globose, 200-285/a in diameter, 100-195/a high, ostiole 
20-25/a in diameter; sporules subhyaline, vermiform-cylindrical, 
mostly uniseptate, 18-45 x 3!/2-6^, mostly 25-38 x 4-5/a. On 
leaves and petioles of Sisymbrium canescens . “Not to be con¬ 
founded with Septoria sisymbrii Ell. which is on spots and has 
smaller spores. ’ ’ 
57 Ascochyta smilacis Ell. & Evht. 
Journ. Mycol. 8:12. Not A. smilacis E. & M. which is 
Stagonospora smilacis (E. & M.) Sacc. 
“Spots small (1-4 mm.) of irregular shape, dirty white with 
a brown border or large brown areas 1-2 cm. in diameter; pycni¬ 
dia scattered, epiphyllous but mostly visible from below, puncti- 
form, black; sporules elliptical, obtuse, smoky hyaline, unisep¬ 
tate, not constricted, 6-8 x 4/a.” On Smilax hispida. 
58 Ascochyta Solani-nigri Died. 
Hedwigia 42: Beiblatt (166). 
Spots scattered, orbicular or oval, arid, whitish with a dark 
margin; pycnidia globose, brown, thin walled, ostiolate, about 
80/a ; sporules cylindrical with rounded ends, straight or a little 
curved, uniseptate, not constricted, 6-8 x 3/a. On leaves of 
Solanum Melongena. 
