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16. Thallus coarse, generally somewhat upright to sprawling ;<br />

tips abruptly narrowed, generally not curved downward;<br />

usnic acid only in Florida material .................................................................C. caroliniana Schweinitz ex Tuck.<br />

16. Thallus thin; tips gradually narrowing and downward pointing;<br />

usnic acid only in Florida material .................................................................................. C. dimorphoclada Robbins<br />

15. Podetia gray-white, ecorticate; podetial wall very thick, with scattered<br />

cartilaginous strands; south to Broward County ........................................................................ C. pachycladodes Vainio<br />

14. Cortex well developed............................................................................................................................................................ 17<br />

17. Podetia coarse, erect, hollow, perforate; PD-, squamatic acid;<br />

Highlands and Okaloosa counties ........................................................................................................ C. perforata Evans<br />

17. Podetia delicate, in lax, tangled, recumbent colonies; PD+ yellow<br />

(baeomycesic and squamatic acids); north to Polk County......................................... C. subsetacea Robbins ex Evans<br />

13. Podetia simple or sparingly branched........................................................................................................................................ 18<br />

18. Thallus PD-............................................................................................................................................................................ 19<br />

19. Podetia not forming cups ................................................................................................................................................ 20<br />

20. Squamules coarse, maculate; podetia proliferating, perforate,<br />

broadly expanded above; numerous apothecia on ultimate<br />

proliferations; squamatic acid; on Taxodium; Franklin and<br />

Liberty counties........................................................................................................................... C. buckii R. C. Harris<br />

20. Squamules thinner, emaculate; podetia mostly simple, mostly decorticate,<br />

narrower than the apothecia; barbatic acid; Duval and Seminole counties...................................................................<br />

................................................................................................................................... C. botryocarpa Merr. ex Sandst.<br />

19. Podetia forming broad cups, coarsely sorediate/areolate; grayanic acid;<br />

northern Florida .........................................................................................................................C. grayi Merr. ex Sandst.<br />

18. Thallus PD+ yellow, orange or orange-red ........................................................................................................................... 21<br />

21. Thallus PD+ yellow or orange .......................................................................................................................................... 22<br />

22. Podetia not forming cups ........................................................................................................................................... 23<br />

23. Squamules linear, large; podetia rarely squamulose, broader at top;<br />

norstictic acid or norstictic and stictic acids ......................................................................................................... 24<br />

24. Norstictic and stictic acids; south to Polk County ..............................................................C. polycarpia Merr.<br />

24. Norstictic acid ± atranorin; northern Florida.................................................................. C. polycarpoides Nyl.<br />

23. Squamules irregular, small; podetia often squamulose; thamnolic or<br />

baeomycesic acid ................................................................................................................................................. 25<br />

25. Thallus KOH+ deep yellow (thamnolic and barbatic acids)........................................................................... 26<br />

26. Cortex dispersed, coarsely areolate/squamulose; podetia<br />

short, rarely branched; central Florida ......................................................................... C. santensis Tuck.<br />

26. Cortex continuous; podetia taller, with few squamules,<br />

commonly branched, especially above; south to Polk County .................................... C. floridana Vainio<br />

25. Thallus KOH- ................................................................................................................................................. 27<br />

27. Squamules and podetia C-, KC-(baeomycesic and<br />

squamatic acids); podetia densely squamulose;<br />

south to Charlotte County..................................................................... C. beaumontii (Tuck.) Vainio<br />

27. Squamules and podetia C+, KC+ blue-green (strepsilin,<br />

baeomycesic and squamatic acids); podetia usually not<br />

densely squamulose, often lacking; rare, Holmes and<br />

Washington counties ........................................................................... C. strepsilis (Ach.) Grognot<br />

32

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