PLATE XIII 
Figs. A-G.— Hypomyces ipomoeae (Hals.) Wollenw. Fig. H.— Fusarium incarna - 
turn (Rob.) Desm. Fig. J.— Hypomyces cancri (Rutg.), n. comb. The drawings of 
H. ipomoeae were made from subcultures on moist wheat heads of a strain isolated by 
Dr. Reddick, Cornell University Experiment Station, from a badly rotted sweet 
potato ( Ipomoea batatas ), sent him from Wooster, Ohio, on April 30, 1907, by J. M. 
van Hook of the Ohio State Agricultural Experiment Station. F. incarnatum is 
illustrated from a strain isolated from sweet potato. 
Fig. A.— Hypomyces ipomoeae. Ascospores: 1, Ellipsoidal shape; 2, form of a double 
paraboloid; 3, overripe, slightly swollen stage; 4, separation of the two cells in over¬ 
ripe stage. X 1,000. 
Fig. B.— Hypomyces ipomoeae. Asci with a paraphysis. X 500. 
Fig. C.— Hypomyces ipomoeae. Perithecium. X 200. 
Fig. D.— Hypomyces ipomoeae. Chlamydospores: 1 and 3, lateral; 2, intercalated 
and terminal; 4, intercalated within a conidium (conidiochlamydospore). X 1,000. 
Fig. E.— Hypomyces ipomoeae . Perithecium formed by spiral coiling of a lateral 
hypha. X 5°°* 
Fig. F.— Hypomyces ipomoeae. False coni dial heads produced at the end (1) of 
conidiophores by spores suspended in drops of water. The conidiophore sprang from 
an old conidium which was separated into two parts, one of which was dead (a). 
X 5 °°* 
Fig. G.— Hypomyces ipomoeae . Normal conidia: 1, More curved at the ends than 
the other spores; 2-7, tri- to quinque-septate spores. 
Fig. H.— Fusarium incarnatum (Rob.) Desm.: Conidia, a, short, b , slender; 1-3, 
normal 5-septate conidia; 4, lanceolate; 5, exceptionally large; c, pedicellate base 
without heel. 
Fig. J,^— Hypomyces cancri (Rutg.), n. comb.: Mature conidia, the first one (1) being 
especially large. 
