Davis—-North American Ascochytae 
661 
25 Ascochyta graminicola Sacc. 
Mich. 1:127. 
Spots definite, sordid white, purple bordered, oblong to oval, 
5-8 mm. long, or none; pycnidia aggregated, punctiform, lenti¬ 
cular, with distinct parenchymatous, fuligenous walls, ostiolate, 
100-120/x in diameter; sporules hyaline, fusoid to ovate-fusoid, 
10- 20 x 21/2-4/*. On leaves of grasses. There is apparently 
some confusion of this with Darluca filum (Biv.) Cast. 
26 Ascochyta hanseni Ell. & Evht. 
Bull. Torr. Bot. Club 24 :464. 
Spots amphigenous, irregular, definite, livid purple above, 
paler and sub-rufous below, 2-10 mm. in diameter; sporules 
brown tinted, oblong-cylindrical, obtuse, slightly curved, 
1- (1-2) septate, not constricted, 15-20x6/*. On leaves of 
Arbutus Menziesii. 
27- Ascochyta garrettiana Syd. 
Ann. Mycol. 3: 185. 
Immaculate; pycnidia on leaves, rarely on stems also, black, 
globose, about 175-250/* in diameter; sporules hyaline, granular, 
cylindrical, rounded at the ends, usually straight, uniseptate, 
11- 20 x 2y 2 -S 1 / 2 f l . On Orthocarpus Tolmiei. 
28 Ascochyta imperfecta Pk. 
Report for 1911 pp. 21 and 106. (March, 1912). 
Spots amphigenous, variably orbicular, semicircular or sub- 
triangular, the larger ones usually terminal or marginal, pale 
brown or smoky brown, not sharply defined; pycnidia amphi¬ 
genous, few, depressed, brown or blackish brown, 300-600/* in 
diameter; sporules variable, hyaline, oblong or subcylindrical, 
obtuse, continuous or pseudo-uniseptate, 6-15 x 2i/2-4y- On 
leaves of Medicago sativa.A 6 It may be separated from Ascochyta 
medicaginis Bres. by its habitat and smaller peritheeia and 
spores. ’ ’ 
29 Ascochyta infuscans Ell. & Evht. 
Journ. Mycol. 5:148. 
Spots indefinite, brown, sometimes faintly zonate or on large 
indefinite brown areas on leaves, petioles, branches and stems; 
