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1 Leaves sessile, the margins scarious and minutely papillose-denticulate; upper stems angled in cross-section, solid; [section Oakesiella].
....3 Undivided portion of the style 0.5-1× as long as the style branches; upper stem and lower leaf surfaces puberulent to glabrous, green; rhizome very short, with clustered, thickened roots
....3 Undivided portion of the style 3-5× as long as the style branches; upper stem and lower leaf surfaces glabrous, usually also glaucous; rhizome elongate, with scattered, fibrous roots.
......4 Pedicel bearing a sessile, leaf-like bract 5-17 mm below the flower; capsule sessile, conspicuously beaked at apex