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EXPLANATION OF PLATE II. 
Fig. 4.—Surface view of epidermis of onion leaf showing a young 
stem protruding through a stoma. EP., epidermal cells; sT., stem; 
STO., stoma. 
Fig. 5—A slighter older stem beginning to branch; letters as in 
Fig. 4. 
Fig. 6.—A spore beginning to germinate ; T., tubular outgrowth. 
Fig. 7.—A spore germinating ; a tubular outgrowth entering the leaf 
through the stoma; sP., spore ; T., tubular outgrowth; sTo., stoma. 
Fig. 8.—The formation of the resting-spores; AN., small knob 
(Antheridium) ; 0G., large knob ( Oognium). 
Fig. 9.—The resting-spores with their thick cell-walls. 
