Davis—North American Ascochytae 
669 
epiphyllous, brown, blackened about the ostiole, 100-200/a; 
sporules hyaline, ovoid, oblong, or reniform, 2-4 guttulate, be¬ 
coming uniseptate, frequently constricted, 7-14x5-7/*. On 
leaves of Silphium integrifolium and Vernonia noveboracensis . 
64 Ascochyta veratrina Ell. & Evht. 
Proc. Acad. Nat. Sci. Phila. 1894 p. 364. 
Pycnidia scattered, sunk in the substance of the leaf with the 
apex and conic-papilliform ostiolum erumpent, about % mm. in 
diameter; sporules hyaline, cylindrical, obtuse, 3-4 guttulate, 
becoming uniseptate, about 12 x 2%-3/a. On dead leaves and 
petioles of Veratrum calif ornicum. 
4 'Differs from A. Veratri, Cavarra (Fungi Langobardiae No. 
98) in its larger ostiolate perithecia, not on any spots and in its 
smaller, straight sporules.’’ 
65 Ascochyta violae Sacc. & Speg. 
Mich. 1 :163. 
Spots various, becoming whitened; pycnidia gregarious, glo¬ 
bose-lenticular, walls parenchymatous, blackened about the 
ostiole, 180-200; sporules hyaline, short-fusoid, uniseptate, not 
constricted, 15-18 x 3%-4/a. On leaves of Viola. 
66 Ascochyta wisconsina Davis. 
Trans. Wis. Acad. 18 1 :101. 
Spots orbicular to elliptical, grey with a narrow black border 
and frequently zonate above, brown to olivaceous with a less dis¬ 
tinct border below, 1-3 cm. long; pycnidia epiphyllous, scat¬ 
tered, brown, prominent, globose to sublentieular, 85-110/a; 
sporules hyaline, ovoid to oblong, 4-8 x 2%-3%/*. Some of the 
longer sporules have a medium septum. On leaves of Sam- 
bucus canadensis and 8. racemosa. 
67 Ascochyta zeicola Ell. & Evht. 
Hedwigia 42 , Beiblatt (166). 
On slightly darker, irregular or sub-elongated areas; pycnidia 
gregarious, suberumpent, ostiolate, 100-150/*; sporules hyaline, 
yellowish in mass, oblong-cylindrical, obtuse, uniseptate, not 
constricted, 6-8 x 1%-2/a. On old stalks of Zea Mays. 4 4 Very 
different from A. Zeina Sacc. which is on the leaves and has 
sporules 18 x 7/a.” 
