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[Vol. Ill 



Explanation ok Fig. 88. 

 Fig. 88. Per-o-nos'-po-r.\ floer-ke'-ae. Leaf Mildew of False Mermaid. This is 

 is a parasitic fungus that attacks the little wild plants of the woods and shady places, 

 called the False Mermaid. The Mildew is usually abundant oh the lowest leaves and 

 often overs the entire plant, stunting the growth of the host very much. Without a 

 lens even the parasite can be seen when abundant, forming a powdery or white fuzzy 

 covering over the epidermis. This consists of little branched hy'phae as shown in 

 I'igures 2, 3 and 4 on the opposite ])age (Fig. 88). These tree-like co-nid'-i-o-phores, 

 as they are called, bear the spores, i. e., co-nid -i-u ; one co-nid'-i-um is still attached 

 in Figure 2. Four co-nid' -i-a. mature, are shown in Figure .5. Besides these spores — 

 summer spores they are — there are others (as shown in Figure 6) that have thickened 

 walls and can endure the winter. They germinate in the sjiring — the parasite is an 

 annual plant. Those winter sports are formed within the tissues of the leaves and 

 stems of the host. A plant much dwarfed by the attack of the parasite is shown also 

 (Figure 1). This fvuigus is somewhat similar to the Powdery Mildew, or Grape Rot, 

 that inflicts great damage on vine yards. .\ full account of his new species, with 

 leclmical ilescrii)tiiin was given in the lournal of Mycology. .Tuly. 1004. 



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The Mycological Bulletin is issued on the 1st and I5th of each Month, Price 25c. Copies 

 of Vol. II (1904) may be had for 50 cents each, or cloth bound copies for 75 cents. No copies 

 remain of Vol. I (1903) except a few cloth bound for which 75 cents is charged. 



