insula is the first illustrated, comprehensive guide to the vascular plants found in Michigan's Upper Peninsula and on the islands of Isle Royale. Included are keys, descriptions, and distribution information for over 1,900 plant species in 123 plant families.

Includes:

• Keys to the vascular plant families, genera and species of the Upper Peninsula and Isle Royale Organized into four major groups: Ferns and Fern Relatives, Conifers, Dicots, Monocots
• Over 1,900 species described and illustrated Conservation status in Michigan (endangered or threatened)
• Native, introduced, or invasive in Michigan
• Wetland indicator status
• Coefficient of conservatism Habitat information
• Fully indexed for ease-of-use