- Source: Trachelium caeruleum
- Trachelium caeruleum
- Trachelium (plant)
- List of wort plants
- List of garden plants in North America
- List of sequenced plastomes
- Flora of Malta
- List of plants in the Gibraltar Botanic Gardens
- List of superrosids of Great Britain and Ireland
- List of endemic plants of Sicily
- List of vascular plants of the Karelian Isthmus
Trachelium caeruleum, common name blue throatwort, is a species of flowering plant in the family Campanulaceae native to the Mediterranean, where its native range includes Algeria, Morocco, Portugal, Spain, and Sicily. It has also become naturalized in a few areas, including New Zealand, the Azores, and parts of mainland Europe.
Growing to 120 cm (47 in) tall by 30 cm (12 in) wide, it is a woody-based erect herbaceous perennial, with oval leaves and dense cushions of violet-purple flowers in summer. The specific epithet caeruleum means "dark blue".
In temperate climates this plant is usually grown as a half-hardy annual for summer bedding schemes or planters. It has gained the Royal Horticultural Society's Award of Garden Merit. There are many cultivars with a variety of flower colors, including white, red, pink, and dark purple.