Keys to the macrolichens and checklist of the lichens and ...

4b. Podetia moderately branched; contains thamnolic or squamatic acid (PD+ yellow
or PD-) ..................................................................................................................... 6
5a. Podetial walls with lateral fissures and perforations, stereome thinC. corymbescens
5b. Fissures and perforations lacking, stereome thick and hard ............. C. scabriuscula
6a. Surface of the podetia smoothly corticate, sometimes with few microsquamules,
medulla UV-............................................................................................. C. crispata
6b. Surface of the podetia rough, microsquamulose, medulla often UV+ white.
................................................................................................................C. squamosa
7a. Apothecia when present brown; lower surface of squamules without yellow......... 8
7b. Apothecia when present red; lower surfac of squamules often partly yellow ....... 27
8a. Podetia ascyphose, blunt, esorediate, commonly terminating in hymenial discs .... 9
8b. Podetia scyphose or if ascyphose, then usually subulate, sorediate and without
hymenial discs........................................................................................................ 10
9a. Basal squamules small; contains fumarprotocetraric acid (PD+ red) C. peziziformis
9b. Basal squamules large; contains psoromic acid (PD+ yellow, K-)... C. macrophylla
9c. Basal sqamules large; contains norstictic acid (K+red)..................C. polycarpoides
10a. Podetia at least partly sorediate.............................................................................. 11
10b. Podetia esorediate, smoothly corticate to squamulose........................................... 19
11a. Podetia lacking scyphi ........................................................................................... 12
11b. Podetia bearing distinct scyphi .............................................................................. 14
12a. Podetia sorediate throughout, not or scarcely melanotic ....................................... 13
12b. Podctia esorediate, melanotic, verruculose...................................... C. melanocaulis
13a. Podctia repeatedly branched, soredia coasre, caducous..................... C . corniculata
13b. Podetia simple or with few branches; soredia finely granulose, immixed with
microsquamules ................................................................................... C. subradiata
14a. Podetia entirely sorediate, scyphi wide.................................................................. 15
14b. Podetia partly corticate .......................................................................................... 16
15a. Soredia farinose to finely granulose, immixed with microsquamules down to base
.......................................................................................................... C. subsquamosa
15b. Soredia granulose.............................................................................. C. chlorophaea
16a. Scyphi narrow (0.5-1.5 mm), soralia tuberculate, partly epicorticate; podetia pale
greenish-brown ....................................................................................C. phyllopoda
16b. Scyphi generally wider (1-4 mm), soredia not tuberculate.................................... 17
17a. Scyphi deep, often with fundic perforations.....................................C. poeciloclada
17b. Scyphi shallow, closed........................................................................................... 18