SioSa 



s 



^^\ ACKNOWLEDGEMENTS 



We wish to thank Drs. Robert Krai and John W. Thieret for their 

 helpful comments on the manuscript. We are also grateful to the 

 curators of the following herbaria for use of their collections: BOSC, 

 BRU, CONN, CUW, GH, HNH, KIRI, MASS, MAINE, NCBS, NHA, 

 NEBC, VT, and YU. A special thanks is extended to Pamela Bruns, 

 who prepared the illustrations. Scanning Electron micographs were 

 prepared on an AMR lOOOA Scanning Electron Microscope at the 

 University of New Hampshire; the technical assistance of Ms. Marilyn 

 Ecker is appreciated. 



Ccfyiight 1983 



Uuiversity of N€i Haapshire 



Programs of the New Hampshire Agricultural Experiment Station are open to all 

 persons without regard to race, color, national origin, or sex. The University of New 

 Hampshire is an Affirmative Action/Equal Opportunity Employer. 



