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Blackstonia grandiflora, often known as Large-flowered Blackstonia, is an annual herbaceous plant belonging to the Gentianaceae family. It is primarily found across the Mediterranean region and is recognized for its vibrant yellow flowers and distinct perfoliate leaves.
Key Biological Facts
Scientific Classification: While often treated as a distinct species, it is also classified as a subspecies of the common Yellow-wort, specifically Blackstonia perfoliata subsp. grandiflora.
Appearance: It typically grows between 30 to 70 cm tall. Its flowers are larger than other subspecies (20–30 mm in diameter) and can feature up to 12 floral parts.
Native Habitat: It thrives in the subtropical biomes of the Western and Central Mediterranean, including Spain (Balearic Islands), Morocco, Algeria, and Tunisia. It prefers dry grasslands, rocky slopes, and basic (alkaline) substrates.
Etymology: The genus Blackstonia is named after John Blackstone, an 18th-century English botanist. The species name grandiflora is Latin for "large-flowered".
Traditional Uses: In some regions, it has been used in traditional medicine to treat ailments like fever and stomachaches, similar to other members of the Gentian family known for their "bitters".
