LICHENS OF THE STATE OF WASHINGTON 53 



P. Thallus not very thick, medulla not blue with IKI. 



Q. Spores rarely less than 15 /a long 8. L. contigua 



Q, Spores rarely more than 15 /* long 6. L. auriculata 



A. On bark or old wood. 



B. Bordered by conspicuous black hypothalline lines. 

 C. Hypothecium yellowish brown or dark brown. 



10. L. elaeochroma f. geographica 



C. Hypothecium hyaline 28. L. varians 



B. Not bordered by conspicuous black hypothalline lines. 



D. Hypothecium rarely hyaline, usually brown, disk of apothecium 



black. 

 E. Paraphyses free, tips bluish black 15. L. parasema 



E. Paraphyses coherent, tips colorless 33. L. ostreata 



D. Hypothecium hyaline, disk variously colored. 



F. Disk scarlet 20. L. cinnabarina 



F, Disk not scarlet. 



G. Spores broadly ellipsoid, thick walled 27. L. tornoensis 



G. Spores not broadly ellipsoid, thin walled. 



H. Always on bark 21. L. furvonigrans 



H. Not always on bark. 



I. Thallus absent or very thin and inconspicuous. 

 J. Margin of apothecia not darker than the disk. 



19. L. carnulenta 

 J. Margin of apothecia not darker than the disk. 



24. L. myriocarpella 

 I. Thallus present, consisting of granules. 



K. Thallus brown or olive brown, margin of apothecia 



becoming lobate 23. L. holopolia 



K. Thallus yellowish white or greenish gray, margin of 

 apothecia flexuous 25. L. paddensis 



A. Usually on soil or moss, rarely on old wood. 

 B. Thallus granulose. 



C. Apothecia hemispherical or globose, hypothecium brown. 



3. L. arctica 



C. Apothecia circular, hypothecium pale yellow. 22. L. granulosa 



B. Thallus squamulose (Psora). 



D. Thallus flesh-color (R), an orange shade, or brick red. 



29. L. decipiens 

 D. Thallus some shade of gray or brown. 



E. Squamules white edged 34. L. rubiformis 



E. Squamules not white edged. 



F. Light colored under surface of squamules easily seen, showy, 



prominent 31. L. globifera 



F. Under surface of squamules not easily seen. 



G. Hypothecium hyaline or pale yellow. 30. L. demissa 



G. Hypothecium dark brown. 32. L. lurida 



