VI 
Journal of Agricultural Research 
Vol. II 
Two New Wood-Destroying Fungi 
Plate IX. Fig. i.— Fomes putearius from the wood of Larix occidentalism showing 
a typical pileate fruiting structure; also a section through the resupinate 
form. Fig. 2.— Larix occidentals, showing decay of the wood by Fomes 
putearius. Fig. 3.— Pinus ponderosa, showing disintegration of the wood by 
Fomes putearius. Fig. 4.— Pseudotsuga taxifolia, showing the typical decay 
caused by Fomes putearius. Fig. 5.— Picea engelmanni, showing the differ¬ 
ent stages of the decay caused by Fomes putearius . 
Plate X. Fig. 6.— Trametes setosus on Pirns monticola; resupinate form. 
Fig. 7.— Trametes setosus on Pirns montico la; sessile pileate form. Fig. 8.— 
Trametes setosus: common form on Thuya plicata. Fig. 9.— Trametes setosus 
on Larix occidentals. Fig. 10.— Thuya plicata, showing decay of the wood 
caused by Trametes setosus. Fig. n.— Trametes setosus: Transverse section 
of the pores, showing the numerous setae. 
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166 
166 
Identity of Peridermium Fusiforme with Peridermium Cerebrum 
Plate XI. Fig. 1.—A globoid swelling formed by Peridermium cerebrum on 
Pinus echinata, showing the cerebroid arrangement of the aecia. Fig. 2.—A 
fusiform swelling caused by Peridermium fusiforme on Pinus taeda, showing 
a similar cerebroid arrangement of the aecia. Fig. 3.—A leaf of Quercus rubra 
bearing the teliaof Cronartium cerebrum from an inoculation with aeciospores 
of Peridermium cerebrum on Pinus virginiana. Fig. 4.—A leaf of Quercus 
phellos bearing the uredinia of Cronartium cerebrum from an inoculation 
with the aeciospores of Peridermium fusiforme . 250 
Identification of Species of Fusarium Occurring on the Sweet Potato, 
Ipomoea Batatas 
Plate XII. Fig. A.— Fusarium batataiis, n. sp.: Mycelium stage with blue 
sclerotial plectenchymata on steamed potato tuber. Fig. B.— Fusarium 
batatatis, n. sp.: Ochreous- to salmon-colored pionnotes on the same me¬ 
dium, but from a transfer of a single sickle-shaped conidium. Fig. C.— 
Fusarium batatatis , n. sp.: Wine-red acid color modification of the fungus 
on steamed rice, turning blue with alkali. 286 
Plate XIII. Figs. A-G.— Hypomyces ipomoeae (Hals.) Wollenw. Fig. H.— 
Fusarium incarnatum (Rob.) Desm. Fig. J.— Hypomyces cancri (Rutg.), 
n. comb. Fig. A.— Hypomyces ipomoeae: Ascospores. x, Ellipsoidal 
shape; 2, form of a double paraboloid; 3, overripe, slightly swollen stage; 
4, separation of the two cells in overripe stage. Fig. B.— Hypomyces 
ipomoeae: Asci with a paraphysis. Fig. C.— Hypomyces ipomoeae: Peri- 
thecium. Fig. D.— Hypomyces ipomoeae: Chlamydospores. 1 and 3, 
lateral; 2, intercalated and terminal; 4, intercalated within a conidium 
(conidio-chlamydospore). Fig. E.— Hypomyces ipomoeae: Perithecium 
formed by spiral coiling of a lateral hypha. Fig. F.— Hypomyces ipomoeae: 
False conidial heads produced at the end (1) of conidiophores by spores 
suspended in drops of water. The conidiophores sprang from an old con¬ 
idium which was separated into two parts, one of which was dead (a). 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.— Fusa¬ 
rium 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 
286 
