NUTRITION. 25 



11. Lepiota rhaeodes. 



Leaves — very siood growth. 



Soil — slight growth. 



Manure — slight growth. 



Beans — very good growth throughout. 



Sugar beet — very good growth throughout. 



12. Morehella esculenta. 



Leaves — very good growth ; mycelium never dense. 



Soil — very little growth. 



Manure — very slight growth. 



Beans — very good growth. 



Sugar beet — good growth, l»ut slower than above. 



13. rieurotus ostreatus. 



Leaves — very good growth ; rapid. 



Soil — fair growth. 



Manure — good growth. 



Beans — very good growth ; rapid. 



Sugar beet — slight growth ; very slow. 



14. Pleurotus ulmarius. 



Practically the same as Pleurotus o.streatus. 



15. Polyporus sulphureus. 



Leaves — fair growth: al)un(lant, tilling tube. 

 Soil — fair growth. 



Manure — fair growth, but very slow. 

 Beans — very good growth, rapidly tilling tube. 



Sugar beet— fair growth; much lighter mycelium than the above, with 

 prompt oidial development. 

 IC. Tricholoma personatum. 



Leaves — very good growth throughout. 

 Soil — very good growth throughout. 

 Manure — growth slow, but eventually good. 

 Beans — good growth throughout. 



Plates II, III, and IV show some of the more important of these 

 species. 



Taking into consideration the variable qnality of the stable manure 

 which may be obtained at all seasons, the value of half-rotted decid- 

 uous leaves as a substratum for Basidiomycetes is worthy of special 

 emphasis. The writer has found such material more readily sterilized 

 than manure, and usually more prompt than the latter to give growth. 



In order to test in pure cultures the probable effect of fertilizers 

 as indicated by any marked increase in the rapidity of growth of the 

 mycelium, experiments were made by adding a small quantity of 

 ordinary nutrient salts to test tubes containing manure. A chlorid 

 and a nitrate of the following salts were employed, viz, ammonium, 

 calcium, magnesium, and potassium. In addition, dibasic potassium 

 phosphate and also sodium chlorid, as Avell as control cultures, were 

 used. Three tubes were employed with each of the compounds men- 

 tioned. There was no marked difference in the amount or rapidity 

 of the growth noted, as found by comparing the averages of growth. 



