Collection and Preservation of Fungi, 55 



water, undergo the greatest amount of change in drying. 

 The cup-shaped species belonging to PezizasLnd allied 

 genera, should be allowed to part with their moisture, 

 and then slightly flattened, but not pressed so as to 

 crush the specimens unnecessarily. The larger forms, 

 such as species of Morcliellcij may with advantage be 

 cut down the centre, being too bulky for herbarium 

 specimens when dried entire. The bright colour of 

 the hymenium of many species disappears or becomes 

 changed during drying, and should be noted when 

 fresh, the note accompanying the dried specimen, in 

 fact, a duplicate of the notes and sketches made should 

 always be placed along with the specimen in the 

 herbarium. In the Agaricine^, or gill-bearing fungi, 

 dried specimens, unless carefully prepared, are worth- 

 less, hence careful sketches and notes taken from 

 the living specimen are indispensable. The smaller 

 species, after being allowed to part with a considerable 

 amount of moisture, may be placed under slight 

 pressure, and it is best to place the specimens at once 

 on the paper where they are intended to remain, as in 

 pressing they usually stick to the paper. If oiled paper, 

 or the preparation known as vegetable parchment, is 

 placed upon the specimens when first exposed to 

 slight pressure, it can be removed without adhering to 

 the specimens, which after being pressed flat should 

 again be exposed to the air to dry. If sections are not 

 prepared, it is necessary that specimens should be so 

 arranged as to show both upper and under side of the 

 fileus or cap, in fact, as the student will readily under- 

 stand, it is impossible to have too many illustrations 

 of a species, and not simply to illustrate the points 



