100 



^Vhen the hymeniiim is concave the part not touching the paper 

 fails to show a perfect impression of the lamellae. 



Sporophores collected in January and February in a frozen con- 

 dition were most favorable material for spore prints. The frozen 

 sporophores under room temperature thaw out quickly and in four 

 hours a light spore print is obtained. In twelve to twenty-four 

 hours a heavy spore print would be made. The heavy spore 

 prints brought out the dominant pink or salmon color of the spore 

 mass. Material collected in March, but which had become dried 

 out several times with exposure, was not so favorable for spore 

 prints. Such sporophores collected early in the morning and still 

 moist would not show spore prints until after eight or ten hours 

 at room temperature. Attempts to secure spore prints at higher 

 temperature, such as over a steam radiator, were negative. It 

 would appear that a gradual drying is the condition favorable for 

 spore discharge rather than sudden drying out. 



The use of black glazed paper was found most favorable for 

 demonstrating spore prints as well as the pink color of the spore 

 mass. The characteristic split lamella is well illustrated by the 

 spore prints. With respect to the color of the spore mass, this 

 agaric would appear to be related with the rhodosporae rather than 

 the leucosporae. 



Since this fungus is so cosmopolitan material can be secured for 

 class demonstration at times when field agarics are not available. 



SHORTER NOTES 



Another Sonchus for America. — The genus Sonchus is not 

 known to be native in the Western Hemisphere. There are nearly 

 fifty species known from the ( )]d World, and only three — all rather 

 coarse weeds — have heretofore become widely naturalized in Amer- 

 ica. A fourth species is locally naturalized in southern California. 

 Last summer, however, a fifth species, Sonchus uliginosus, a 

 native of southern Russia, was found established in fields in North- 

 ampton County, Pennsylvania. We have specimens, preserved in 



