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

Ramalina Key:
1a. Thallus with soredia................................................................................................. 2
1b. Thallus without soredia............................................................................................ 4
2a. Thallus hollow ............................................................................................R. tenella
2b. Thallus solid............................................................................................................. 3
3a. Soralia punctiform .................................................................................R. peruviana
3b. Soralia rounded ...................................................................................... R. nervulosa
4a. Thallus hollow ......................................................................................................... 5
4b. Thallus solid............................................................................................................. 6
5a. Thallus less than 1 mm thin, apothecia rare.............................................R. javanica
5b. Thallus thicker, irregular, apothecia common ............................................ R. inflata
6a. Thallus canaliculate to flattened .............................................................................. 7
6b. Thallus subterete ........................................................................................ R. tropica
7a. disc margin with white lines ...............................................................R. subfraxinea
7b. disc margin without white lines ....................................................... R. conduplicans
Relicina Key (extracted from Elix, J.A. 1996a. A revision of the lichen genus Relicina.
Bibliotheca Lichenologica 62: 1-150.):
1a. Thallus isidiate and/or lobulate................................................................................ 2
1b. Thallus not isidiate or lobulate............................................................................... 14
2a. Isidia globose to cylindrical..................................................................................... 3
2b. Isidia dorsiventral, becoming lobulate, or lobules only........................................... 8
3a. Lower surface pale brown to dark brown ................................................................ 4
3b. Lower surface black, rarely brown-black at lobe margins....................................... 5
4a. Rhizines simple or sparingly branched...............................................R. sydneyensis
4b. Rhizines with secondary rhizines which are densely branched and agglutinated.
..........................................................................................................R. circumnodata
5a. Lobes very narrow and tightly adnate, 0.3-1.0 mm wide .................... R. amphithrix
5b. Lobes broader, adnate, 1-3 mm wide....................................................................... 6
6a. Medulla K+ intense yellow (or orange) or yellow turning red; containing stictic or
norstictic acids ......................................................................................... R. abstrusa
6b. Medulla K-, or K+ pale yellow, containing 4-O-demethylbarbatic, echinocarpic or
gyrophoric acids....................................................................................................... 7
7a. Medulla P+ yellow or orange, containing echinocarpic acid.............. R. planiuscula
7b. Medulla P-, containing gyrophoric acids.................................................... R. vinasii