40 



3. Pileus gray. 

 Pileus reddish. 



Pileus yellowish -brown, darker with age. 



4. Pileus small, 1-1% cm - broad; lamellae subdistant. 

 Pileus larger, 3-5 cm. broad ; lamellae crowded. 



5. Pileus with brownish scurf. 

 Pileus with grayish scurf. 



6. Lamellae attached to the stipe. 

 Lamellae free, not reaching the stipe. 



7. Growing from a sclerotium. 

 Not from a sclerotium. 



8. Lamellae subdistant. 

 Lamellae crowded. 



New York Botanical Garden. 



C. apiculatus Pk. 



C. ephemeras Fr. 



4- 



C. a qua tills Pk. 



C. Berkeley I Mont. 



C. Wrightii B. & C. 



C. radiatus Fr. 



7- 



C. plica tills ( Curt. ) Fr. 



C. ideroti genus E. & E. 



8. 



C. siivalicus Pk. 



C. anvulalus Pk. 



HANDLING HERBARIUM SPECIMENS IN CLASSES 



By Francis E. Lloyd 



Teachers who make use of herbarium material of any kind 

 for demonstration in classes, especially if the number of students 

 is large, have experienced considerable discomfort incident to the 

 danger of damage to the specimens by rough handling. But as 

 many of us know, with even careful handling, the danger is still 

 great, and any method of avoiding the danger at small cost will 

 be welcomed. 



Heretofore, glazed frames of various forms have been used to 

 some extent, and these have generally a fair degree of efficiency. 

 The only serious objection has been their weight and costliness, 

 and the danger of glass breakage is here, too, not slight. At 

 any rate such frames have not come into general use. The ob- 

 jection may be avoided, however, by the use of sheets of trans- 

 parent celluloid or xylonite instead of glass. These sheets may 

 be used in two ways, as follows. 



If it is desired to show ordinary herbarium specimens a pocket 

 may be constructed large enough to engage an herbarium sheet 

 of ordinary size. The pocket is made by taking a sheet of stiff 

 cardboard and of xylonite of the same size. One edge of both 

 xylonite and cardboard should be bound with photographers' or 



