Trachelium caeruleum

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.[2] It has also become naturalized in a few areas, including New Zealand, the Azores, and parts of mainland Europe.[2]

Trachelium caeruleum
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Campanulaceae
Genus: Trachelium
Species:
T. caeruleum
Binomial name
Trachelium caeruleum

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.[3] The specific epithet caeruleum means "dark blue".[4]

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.[5][6] There are many cultivars with a variety of flower colors, including white, red, pink, and dark purple.[7]

References
  1. "International Plant Names Index". Retrieved 23 April 2013.
  2. "Trachelium caeruleum". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 23 January 2018.
  3. RHS A-Z Encyclopedia of Garden Plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.
  4. Harrison, L. (2012). RHS Latin for Gardeners. United Kingdom: Mitchell Beazley. p. 224. ISBN 9781845337315.
  5. "RHS Plant Selector - Trachelium caeruleum". Retrieved 5 July 2013.
  6. "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 102. Retrieved 23 December 2018.
  7. Liang, R. and B. K. Harbaugh. (2001). Evaluation of Trachelium cultivars as cut flowers. HortTechnology 11(2), 316-18.
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