Thymus pulegioides

Commonly included in an herb or cottage garden, planted between pavers or rocks, used as a groundcover, or allowed to trail over a wall or the like. It has a mild citrus fragrance and is edible. 3-20 cm, for a dry sunny place in poor stony soil.

Image LuckyLion, CC BY 3.0 <https://creativecommons.org/licenses/by/3.0>, via Wikimedia Commons