Cladonia rangiferina and Lichen

Cladonia rangiferina noun - An erect greyish branching lichen of Arctic and even some north temperate regions constituting the chief food for reindeer and caribou and sometimes being eaten by humans.

Lichen and Cladonia rangiferina are semantically related. In some cases you can use "Lichen" instead a noun phrase "Cladonia rangiferina".

Lichen noun - Any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc..

Cladonia rangiferina and lichen are semantically related. Sometimes you can replace phrase "Cladonia rangiferina" with "Lichen", this terms are similar.