Five-rib thyme is a low, creeping wild thyme native to northeast Asia, including Japan and Korea, and it doesn't grow wild in the US. It has small fragrant leaves and pale lilac to rose-pink flowers in summer, and it's occasionally grown in gardens.

Appearance

Growth form
A creeping, woody-based plant about 4 in (10 cm) tall that spreads along the ground by its stems.
Leaves
Small, aromatic, oblong to narrowly oval leaves in opposite pairs.
Flowers
Tiny two-lipped flowers, pale lilac to rose pink, clustered in short spikes at the stem tips.
Flowering time
July–August in gardens in New York

Where it lives

Typical habitats
  • Rocky mountain slopes
  • Coastal rocks
  • Dry grassland
Range
Native to Japan, Korea, northern China (Manchuria), Mongolia, and Siberia. Not native to the US; grown occasionally in gardens.

Growing it

Care
Rated hardy to USDA zone 4. Its creeping stems form a dense mat 1–2 ft (30–60 cm) wide.

Name and classification

About the name
Some references treat it as a subspecies of wild thyme (Thymus serpyllum subsp. quinquecostatus).

Conservation

IUCN Red List
NENot EvaluatedNot yet assessed

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Five-rib Thyme (Thymus quinquecostatus) — identification, habitat & look-alikes | Moeyo