160 NEW YORK STATE MUSEUM 



Carduus odoratus (Mnlil.) Porter 

 Cniciis pumilus Torr. 

 Pasture thistle. Fragrant thistle 

 Fields. Frequent. July-August. 



Carduus muticus (Michx.) Pers. 

 Cnicus muticus Pursh 

 Swamp thistle 

 Swamps and along streams. Common. August. 



Carduus arvensis (L.) Eobs. 

 Cnicus arvensis Hoffm. 

 Canada thistle 

 Abundant in fields and waste places. July-September. 



EXPLANATION OF PLATES 



PLATE M 



Hygrophorus subrufescens Pk. 

 Eeddish Hygrophorus 

 1.2 Two plants with convex cap 

 3. 4 Two plants with margin of cap curved upward 



5 Vertical section of the upper part of a mature phuit 



6 Four spores X 400 



Collybia uniformis Pk. 

 Uniform Collybia 



7 Cluster of four plants growing from the upper surface 



of a piece of wood, two of them young, two mature 



8 Cluster of three mature plants growing from the lateral 



surface of a piece of wood 

 9-11 Three mature plants, one with curved stem 

 ] 2 Vertical section of the upper part of a mature plant with 

 fully expanded cap 



13 Transverse section of a stem 



14 Vertical section of the upper part of a plant with convex 



cap 



15 Transverse section of a compressed stem 



16 Four spores X 400 



