166. Caloplaca] 41. CALOPLACACEAE 355 



F. Spores rarely more than 12 /* in length 

 G. Thallus orange to greenish gray 



H. Apothecia 0.1-0.6 mm. across, exciple 



entire 30. C.modesta 



H. Apothecia 0.2-1 mm. across, exciple 



entire to slightly wavy 32. C.lobulata 



G. Thallus pale yellow 27. C. fulgens 



F. Spores 12-18 X 5-7 /* 28. C. bolacina 



E. Thallus more or less granulose 

 F. On rocks, soil, or moss 



G. Apothecia 0.2-0.35 mm. across 33. C. cirrochroa 



G. Apothecia 0.2-1 mm. across 31. C. bracteata 



F. On trees 35. C. microphylina 



D. Lobes more or less branched 



E. Lobes long and usually much-branched 



F. Bearing many granules 34. C. elegans trachyphylla 



F. Smooth or obscurely coralloid-granulose .... 34. C. elegans 



E. Lobes short and somewhat branched 29. C. murorum 



B. Thallus subfruticose 



C. Spores 10-16X5-7/* 40. C. coralloides 



C. Spores 20-26 X 15-20 /* 41. C. cladodes 



A. Thallus greenish gray to ashy or brownish, rarely darker 

 B. Thallus not lobed at the margins 

 C. Usually on rocks 



D. Thallus smooth to areolate or squamulose 

 E. Thallus smooth to areolate 



F. Apothecia not more than 0.6 mm. across .... 12. C. festiva 

 F. Apothecia reaching 1 or more mm. across 

 G. Thallus warty to areolate 



H. Thallus thin; apothecia adnate to 



sessile 9. C. cerina 



H. Thallus thicker; apothecia immersed 



to adnate 10. C. sideritis 



G. Thallus distinctly areolate 9. C. cerina areolata 



E. Thallus squamulose 



F. Apothecia 0.1-0.3 mm. across 22. C.amabilis 



F. Apothecia 0.2-1 mm. across 21. C. variabilis 



D. Thallus more or less granulose 



E. Thallus very thin, dark ashy to whitish 15. C. pyracea 



E. Thallus thicker, dirty gray to darker 19. C. oxfordensis 



C. Usually on trees, old wood, moss and soil 

 D. Thallus smooth to wrinkled or areolate 

 E. Spores 11-20X6-10/* 



F. Disk rust-colored to black, often sub- 



pruinose 11. C.ferruginea 



F. Disk olive-green to black 13. C. Pollinii 



E. Spores 10-14 X 5-8 /* 14. C. camptidia 



D. Thallus more or less granulose 

 E. Thallus crustose 



F. Apothecia 0.2-1 or more mm. across 



G. Disk dark red to reddish brown 18. C. Wrightii 



G. Disk dull waxy-yellow 16. C. ulmorum 



F. Apothecia 0.2-0.6 mm. across 17. C. gilva 



E. Thallus more or less plainly squamulose 

 F. Spores rarely more than 15 /c in length 



G. Thallus light gray 23. C. stillicidiora 



G. Thallus dark greenish to brownish . . . . 25. C. pelodella 



F. Spores 14-23X7-11/* 20. C. jungermanniae 



B. Thallus more or less distinctly lobed at the margins 

 C. Spores rarely more than 15 /* in length 

 D. Thallus minutely granulose or powdery 



E. Spores 9-13 X 4-6.5 /* 36. C. eugyra 



E. Spores 12-16X7-9/* 37. C. teicholyta 



D. Thallus smooth 39. C. galactophylla 



