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The slimleaf plainsmustard (Schoenocrambe linearifolia) belongs to Brassicaceae (the Mustard family). It is a perennial herb that is native to Arizona, Colorado, New Mexico and Texas in the southwestern United States. This herb grows in dry rocky areas and up to a height of 30-100 cm. The stems are slender and erect, simple or branched. The basal leaves are petiolate, oblanceolate, 5-10 cm long, and form a rosette in the first-year. The stem leaves are oblanceolate low on the stem and linear above. The flowers bloom in few-flowered racemes at branch tips, from March to September. They are four-petaled, forming an X-shape, each petal 1-2 cm long, lavender to purplish with darker veins. The fruits are linear, very slender capsules.
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