Preface ...................................................... xi
Illustrations ................................................ xv
Coverage ................................................... xvii
Acknowledgments ............................................. xix
Morphology, Anatomy, and Reproduction of New England
Macrolichens .................................................. 1
What is a Lichen? ............................................. 1
Morphology and Anatomy ........................................ 2
Reproduction .................................................. 9
Ecological Role of New England Lichens ......................... 16
Soil Formation ............................................... 16
Nitrogen Fixation ............................................ 17
Food, Shelter, and Camouflage ................................ 19
Human Uses of New England Lichens .............................. 22
Biomonitor for Air Pollution ................................. 22
Old-Growth Forest Indicator .................................. 28
Other Uses ................................................... 30
Biophysical Regions of New England and Their Macrolichen
Floras
Geography .................................................... 34
Geology ...................................................... 34
Climate ...................................................... 35
Natural Forest Vegetation Zones of New England ............... 37
Lichen Biogeographical Regions of North America .............. 39
Major Lichen Biogeographical Zones of New England ............ 40
Specialized Lichen Habitats in New England ................... 42
Changes in Abundance and Distribution of New England
Macrolichens During the Last 100 Years ....................... 44
Decreases .................................................... 45
Increases .................................................... 48
Rare or Declining Macrolichens of New England .................. 50
How to Collect and Identify Macrolichens ....................... 62
Conservation of Lichens ...................................... 62
Collecting and Curating Lichens .............................. 63
Identifying Lichens .......................................... 66
Crustose Lichens of New England ................................ 70
Introduction to the General Keys ............................... 73
Quick Key Index .............................................. 75
General Keys to New England Macrolichens ....................... 76
Tree Keys .................................................... 76
Rock Keys .................................................... 93
Soil Keys ................................................... 106
Introduction to Genus and Species Descriptions ................ 113
Genus and Species Descriptions of the Macrolichens of New
England ..................................................... 116
Literature Cited .............................................. 527
Abbreviations ................................................. 546
Glossary ...................................................... 548
Appendices .................................................... 557
1. Key to the Major Photobionts in New England
Macrolichens ............................................. 557
2. Excluded Species ......................................... 559
Index of Latin Names .......................................... 565
Index of English Names ........................................ 579
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