Salvia carduacea, the thistle sage, is an annual herb native to California and Baja California, found up to 1400 m elevation. It responds drastically to its environment, growing anywhere from 15 cm to 1 m in height. The wooly white basal leaves resemble a thistle's, with long spines, while the flowers grow in whorls on calyces that are wooly and spiny. The flowers are a vibrant lavender with bright orange anthers. The foliage is pungent, with a scent similar to citronella.

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