LIST OF ILLUSTRATIONS

Fig. 1	Quercus garryana (OregonWhite Oak)
2	Fraxinus latifolia (Oregon Ash)
3	Growth Stages of a Twig
4	Map of Lichens Indicating Air Quality in the Willamette Valley
5	Evernia prunastri (Wrinkled Evernia)
6	Hypogyrnnia physodes (Inflated Hypogyrnnia)
7	Hypogyrnnia tubulosa (Tubular Hypogyrnnia)
8	Lecanora. sp. (L. carpinea, L. confusa, L. pacifica)
9	Lepraria membranacea (Powdery Paint Lichen)
10	Lobaria pulmonaria (Lungwort)
11	Parmelia subaurifera (Papery Bronze Parmelia)
12	Parmelia sulcata (Net-Marked Parmelia)
13	Physcia adscendens (Hair-Tipped Physcia)
14	Physcia aipolia (Hoary Physcia)
15	Platismatia glauca (Ragged Platismatia)
16	Ramalina farinacea (Mealy Ramalina)
17	Ramalina leptocarpha (Moose Antler Ramalina)
18	Ramalina menziesii (Fishnet Lichen)
19	Rinodina marysvillensis (Marysville Rinodina)
20	Rinodina archaea (Old Rinodina)
21	Usnea subfioridana (Bushy Cord Lichen)
22	Xanthoria polycarpa (Golden Xanthoria)