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Fig. 106. — Heterosporium gracile from Iris leaf. I 



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A, conidia from diseased leaf ; B, conidia from a pure culture showing unequal distribution of | 

 warts on young spores ; c, D, spores germinating in water ; E, F, spores germinating in prune- j 

 juice agar ; G, thick-walled mycelium sending out hyphae in water ; h, j, hyphas showing i 

 remains of articulations ; k, l, formation and development of conidia ; M, mature spore | 

 germinating in sitti ; n, thick-walled parallel hyphae. ! 



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