A Field Guide to Wildflowers 
Subtitle: Northeastern and North-Central North America (Peterson Field Guides)
Contributors: Roger Tory Peterson (Illustrator, Series Editor)
Publisher: Houghton Mifflin
Published: March 15, 1998
Language: eng
Number of pages: 448
ISBN-13: 9780395911723
First sentence: This is the largest category, but not always a clear-cut one.