noun
heather (plant)
Refers specifically to the heather plant (Calluna vulgaris) or similar low-growing shrubs.
スコットランドの荒野にはヒースが一面に咲いている。
Heather blooms all over the Scottish moors.
noun
heath; heathland
Refers to the landscape or habitat dominated by heather and similar vegetation; less common than the plant sense.
その小説の舞台はイギリスのヒース地帯だ。
The novel is set in the heathlands of England.