Quassia and Quassia amara

Quassia noun - Handsome South American shrub or small tree having bright scarlet flowers and yielding a valuable fine-grained yellowish wood; yields the bitter drug quassia from its wood and bark.

Quassia amara and quassia are semantically related. In some cases you can use "Quassia amara" instead a noun "Quassia".

Quassia amara noun - Handsome South American shrub or small tree having bright scarlet flowers and yielding a valuable fine-grained yellowish wood; yields the bitter drug quassia from its wood and bark.

Quassia and Quassia amara are semantically related. You can use "Quassia" instead a noun phrase "Quassia amara".