20 (30)cm, an ornamental plant from mountainous rock crevices in the Caucasus to Asia Minor (Anatolia, Iran, and Transcaucasus) growing at up to 3.000m. Makes lose, branching stem with nodding bluish-violet to lavender blue, tubular bells and broad, nearly heart shaped, densely pubescent, basal leaves. Easy in any rich, well drained, rocky soil in a sunny to partially shaded spot. Excellent in a protected spot in the rock garden. VI-VIII.
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