28 



Bulletin 138. 



plant. Full directions for taking careful notes or for drying cannot be 

 given here, but may be attempted at some future time. The Agaricus 

 campestris and Lepiota naucina can be dried in the sun, and may then 

 be kept in boxes. Or when moistened again a little by dew, may be 

 pressed lightly between sheets of absorbent paper, and then glued to 

 herbarium sheets or folded in paper packets, as shown in figure 112. 

 Specimens of Amani/a phalloides contain proportionately more water 

 and consequently shrivel more in drying. They are apt to decay before 

 they can be dried in the sun, except in very bright weather. Artificial 



ic8 — Agaricii: c.vmpestris. 



l:crt can be used, but thi.i causes the plants to shrivel still more, unles3 

 tliC process of drying is very slowly accomplished. In this case they 

 should be placed over the source of heat where currents of warm air 

 are rising, and then dried very slowly. In the case of the large and 

 watery ones some cut the plants down into two halves through the 

 stem, then cut out the inner fleshy part of the pileus and stem, and 

 then placing the inner faces on an herbarium sheet, dry under pressure 

 by hot driers, which should be changed frequently. This process pre- 

 serves well the external form and characters where properly done. If 



