Perennials; caudex (buried), branched, (thickened with per-sistent leaf bases, cespitose); densely pubescent (usually grayish-green), trichomes (sessile or short stalked, spreading), several-rayed, rays furcate or bifurcate, slightly fused at base, (tuberculate or finely tuberculate). Stems several from base, erect to decumbent, (unbranched, stout, densely leafy sterile shoots sometimes present), (0.5-)4-2.5 dm. Basal leaves (clustered at stem base); blade linear to linear-oblanceolate, 2-5 cm, margins entire, usually involute, sometimes flattened, (apex obtuse to subacute). Cauline leaves: blade linear-oblanceolate to linear, 1-3.5(-4.5) cm, margins entire, usually involute. Racemes compact, (often nearly subumbellate). Fruiting pedicels (often expanded distally, ascending or recurved, usually straight or slightly curved, rarely nearly sigmoid), 4-15 mm, (stout). Flowers: sepals (yellowish or greenish yellow), ovate or oblong, 4.5-7.5(-9) mm, (lateral pair sometimes cucullate, median pair tapering at both ends, thickened apically, cucullate); petals spatulate or oblong, 6.5-10.5(-15) mm, (base sometimes widened, apex rounded or retuse). Fruits (sessile or substipitate), subglobose to slightly ovoid, usually inflated, rarely compressed or obcompressed, 4-6(-10) mm, (apex acute, slightly flattened); valves sparsely pubescent, trichomes appressed; ovules (8-)12-16(-20) per ovary; style (2-) 3-4.5(-5.5) mm. Seeds flattened. 2n = 18, 20, 36.
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