May 1, 1925 
Taxonomic Studies of Fusarium 
841 
relationship, especially when their per¬ 
fect stages are considered, are arranged 
as follows: 1, Eupionnotes Wr.; 2, 
Arachnites Wr.; 3, Sporotrichiella Wr.; 
4, Camptospora Wr.; 5, Arthrosporiella 
Sherb.; 6, Gibbosum Wr.; 7, Roseum 
Wr.; 8, Liseola n. n. * * * 6 ; 9, Lateritium 
Wr.; 10, Discolor Wr.; 11, Spicarioides 
N.comb. 7 ; 12,Saubinetii Wr.; 13, Elegans 
Wr.; 14, Martiella Wr. (sensu extenos) 8 ; 
and 15, Ventricosum Wr. 
KEY TO THE SECTIONS OF FUSARIUM 
With the exception of section Camptospora (10), which needs further study, all 
of the species are arranged in the following key to the sections: 
a. Microconidia on aerial mycelium usually present and dominately 0-septate, 
ovoid, fusoid, reniform, or pearshaped. 
b. 0-septate conida pearshaped. Macroconidia when normal are in 
shape intermediate between those of the sections Elegans and 
Roseum, though more curved than either; substratum rose-colored, 
intercalary chlamydospores, or similar structures may be present. 
Sec. 3, Sporotrichiella. 
bb. 0-septate not pearshaped. 
c. 0-septate conidia in chains. 
d. Conidial walls thin. Microconidia mostly in chains, fusoid- 
ovoid; macroconidia in form and color similar to those of 
sec. Lateritium; no chlamydospores; substratum vina- 
ceous-violet; some of the species are connected with 
Gibberellas of sec. Lisea (Sacc.) Wr_Sec. 8, Liseola n. n. 
dd. Conidial walls thick or highly retractable. Macroconidia 
pluriseptate, in shape resembling those of the sec. Dis¬ 
color_Sec. 11, Spicarioides n. comb. 
cc. 0-septate conidia not in chains. 
d. Conidial walls thin. Macroconidia attenuate at the top 
ends, pedicellate; terminal and intercalary chlamydo¬ 
spores present; color of conidia brownish to salmon; no 
blue or green color in conidia even as a diffusion from 
stroma; stroma on artificial media principally vinaceous 
to lilac_Sec. 13, Elegans. 
dd. Conidial walls relatively thick. Macroconidia somewhat 
truncate or rounded at the top end, or at least not distinctly 
attenuate, some times slightly constricted at the tip 
ends; terminal and intercalary chlamydospores present; 
color of conidia brown-white to golden brown with 
occurrence of green to green-blue as diffusion from 
stroma_Sec. 14, Martiella . 
aa. Microconidia on aerial mycelium usually absent or 0-3 or more septate, 
reniform, comma, spindle, to sickleshaped. 
b. Macroconidia apedicellate. Color type, orange to light salmon, 
c. Typical pionnotes always present; comparatively slow- 
growing fungi_Sec. 1, Eupionnotes. 
cc. Typical pionnotes absent; comparatively fast-growing 
fungi_Sec. 2, Arachnites. 
bb. Macroconidia subpedicellate to pedicellate. 
c. Terminal chlamydospores present; intercalary chlamydo¬ 
spores absent; no true sporodochia; macroconidia wedge- 
shaped to slightly sickle-shaped, not constricted at the top. 
Sec. 15, Ventricosum. 
e Liseola nn. (Syn. Constrictum Wr. pro parte subs. Elegantis; Moniliforme Sherb.5); Microconidiis 
plus minusve in catenulis, dispositis, fusoideis-ovoideis, macroconidiis forma et colore sectionis Lateritii, 
liberis, in sporodochiis, in pionnote; chlamydosporis nullis; stromaet violaceo. Status conidicus Gib- 
berellarum sect. Liseae (Sacc.) 
7 Wr. Spicariodes (Wr. subsect.) n. comb. (Syn. subsect Spicarioides sectionis Discoloris Wr.) Micro¬ 
conidiis sporodochialibus pluriseptatis forma specierum sectionis Discoloris. Chlamydosporis nullis 
Stromate carmineo. 
8 Martiella Wr. (Sensu extenso sectionis Martiellam Wr. et Pseudomartiellam Wr. includendo). Macro¬ 
conidiis dorsiventralibus fusoideofalcatis, apice rostrato truncato vel rotundato, basi plus minusve sub- 
pedicellata, in sporodochiis et pionnote sordide albo, ochroleuco vel aureo; stromate aerugineo fere 
nigrescenti, chlamydosporis terminalibus, intercalaribus, singulis, binis, catenulatis vel acervalibus. 
Status conidicus Hypomycetum sect. Pseudomartiellae. 
