Treemoss

There are but few plants, also , (such as perhaps, the Yew, Savine, and most treemosses, ) which do not serve for the abode and support of known Insects.

Source: wiktionary

The principal constituents of treemoss are lichen acids, some of which are atranorin, furfuracinic acid and chloroatranorin (Guenther, 1952).

Source: wiktionary

Treemoss products are generally used to “cut” true oakmoss in order to reduce the cost.

Source: wiktionary

Of chemicals relevant for sensitization, a typical industrial treemoss absolute oil (which is also an extract) may contain approximately 0.36% atranol, 0.22% chloratranol and 5-6% dehydroabietic acid and other resin acids (including the allergenic 7-oxodehydroabietic acid), but undetectable levels of atranorin and chloroatranorin, as these are easily degraded into atranol and chloroatranol (20).

Source: wiktionary