What is the meaning of Tree_heath?

The flowering plant Erica arborea, native to east Africa and the Mediterranean.

Other plants of genus Erica of similar habit

1. Erica scoparia (green heath, besom heath, broom heath)

Erica scoparia (green heath, besom heath, broom heath)

Similar plants of other genera in family Ericaceae,

1. especially Trochocarpa laurina of Australia and New Zealand.

   especially Trochocarpa laurina of Australia and New Zealand.

   Dracophyllum arboreum (Chatham tree heath)

   Ecological domains characterized by large numbers of such species of ericaceous plants.

   Source: wiktionary.org