124 



Littleton, west of the fall- line. In the sand-hill region it is very 

 common, being rarely out of sight for about 30 miles, from San- 

 ford to Keyser. (In Georgia I have not seen it within 50 miles 

 of the fall-line.) 



ACANTHOSPERMUM AUSTRALE (L.) Kuntze 



First seen on this trip at Manly, Moore County, N. C, which 

 is about five miles farther north than Aberdeen, where I observed 

 it three years before.* This weed is doubtless steadily pushing 

 northward. It is now very abundant around Aberdeen. 



Parthenium integrifolium L. 

 Seen at several points west of the fall -line in Warren and Wake 

 counties, N. C, in dry soil. 

 Leslie, Georgia, July 10, 1903. 



A KEY TO THE NORTH AMERICAN SPECIES 

 OF PLUTEOLUS 



By F. S. Earle 



The genus Pluteolus includes those gill-fungi having a smooth, 

 viscid, usually expanded pileus, free gills, yellowish-brown 

 spores, and slender usually hollow stems. Some of the species 

 have been confused with Galera, from which they may be distin- 

 guished by the expanded viscid pileus and free gills. Others 

 have been referred to Bolbitius from which they differ in the per- 

 sistent gills that do not deliquesce with age. The following ten 

 species and varieties have been reported from North America. 

 They usually grow either on manured ground or on old rotten 

 wood. 



1. Pileus pure white when young, sordid with age. /'. sordidus (Lloyd) Peck 

 Pileus pinkish-gray, often cespitose. P. coprophihis Peck 

 Pileus yellow. P. liiteus Peck 

 Pileus brown or olivaceous. 2. 

 Pileus violaceous, rugose-reticulate. P. reticulatus (Fers. ) Gillet 



2. Stipe fibrillose. 3. 

 Stipe glabrous or pruinose. 4. 



*See Bull. Torrey Club, 28 : 454. 1901. 



