Leaves are whorled in groups of 8 to 12, very narrow, ½ to 1½ inches long, up to 1/8 inch wide, variously covered in short hairs, sharply pointed at the tip. Leaf edges may be slightly rolled under and the upper surface is typically glossy. Stems are 4-sided with rounded angles, covered in very short hairs to varying degrees, rarely hairless. The lower plant is rather leafy, the upper can be many-branched.

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