May i, 1925 Taxonomic Studies of Fusarium 
835 
Fig. 1 .— Stages in the life cycle of Fusaria: 
A-F, H and S, microconidia. 
I-R, T-X, macroconidia. 
Y, Swellings of hyphae. 
Z, Ai-Di, Chlamydospores. 
Ei-Fi, Conidial propagation from conidia. 
Gp Sclerotium. 
Hi, Sporodochium. 
Ii, Sclerotiain clusters on an erumpent base. 
Ki, Columns formed by conidia borne in chains. 
Li,-Ni, Pionnotes covering either the medium directly (Li), or a mycelial sheet (Mj), or 
numerous associated sporodochia (Ni) formed on the substratum. 
Examples: Fusarium poae (Peck) Wr. (A, J), F. orthoceras App. et Wr. (B, 
E, K, Ai, Bi), F. moniliforme Sheld. (C, F, G, GO, F. chenopodinum (Thiim.) 
Sacc. (D, M, N, Z), F. argillaceum (Fr.) Sacc. (H, I, Ci, Di), F. subcarneum 
Crouan (L), F. flavum (Fr.) Wr. (O), F. dimerum Penz. (P), F. solids Fuck. (Q), 
F. sarcochroum (Desm.) Sacc. (R, S), F. viticola Thiim. (T), F. solani (Mart. pr. 
p.) App. et Wr. (U), F. vasinfectum Atk. (V, normal, W, swollen, X, dried 
spore), F. tridnctum (Cda.) Sacc. with swellings of hyphae (y), F. macroxysporum 
Lindf. with pionnotal propagation of macroconidia (Ei) and development of 
microconidia (Fi). 
