Figures 1-7. Species of Parmelia. 1. Parmelia fertilis (Maine, Biazrov W5/9, MAINE): lobes with reticulated pattern of white pseudocyphellae; apothecia present; no soredia or isidia. X5. 2. Parmelia sulcata (Maine, Hinds 3178, HINDS): laminal soralia of granular soredia. X7. 3. Parmelia fraudans (Minnesota, Wetmore 21800, MIN): coarse, marginal, isidioid soredia. X9. 4. Parmelia saxatilis (Maine, Hinds 2105, HINDS): fine laminal isidia (right) and coarse, furcately branched rhizines (left). X12. 5. Parmelia squarrosa (Maine, Hinds 2828, HINDS): fine, squarrosely branched rhizines. X12. 6. Parmelia omphalodes (Maine, Hinds 2100, HINDS): broad, branched lobes with laminal, reticulated pseudocyphellae. X7. 7. Parmelia neodiscordans (Maine, Hinds 2492, HINDS): narrow, unbranched lobes with marginal pseudocyphellae. X7.