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Article from Bean's Trees and Shrubs Hardy in the British Isles
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'Phlomis' from the website Trees and Shrubs Online (treesandshrubsonline.
A genus of about 100 species of herbs, subshrubs, and shrubs, ranging from the Mediterranean region to China; one species (P. tuberosa, a herb) extending into Central Europe. Flowers yellow, purple, pink, or white, arranged in whorls. Calyx equally five-toothed. Corolla with a hooded upper lip, the lower lip spreading, three-lobed. Stamens four. Style-branches unequal. Nutlets three-angled.