Perennial herb c. 10–20 cm high, erect, stems moderately papillose. Leaves rather thick and fleshy, glabrous and shiny on upper surface. Rosette leaves linear to very narrowly oblanceolate, 15–55 mm long, 1.5–2 mm wide, entire or with 1 or 2 short lobes, ± glabrous but with 1–3 papillae on apex, tapering gradually to a petiole c. 1 mm wide; lower cauline leaves broadly lanceolate, 15–35 mm long, 15–20 mm wide, pinnatifid with 1–3 pairs of linnear pinnae which are entire or with one tooth on distal margin, the margins and lower surface sparsely papillose, particularly on midrib; upper cauline leaves linear-lanceolate, 7–25 mm long, 1–1.5 mm wide, entire or with 1 or 2 short, narrow lobes, the margins and lower surface sparsely papillose, particularly on midrib. Petiole of all cauline leaves short to ± absent. Inflorescence an elongating raceme, 5–c. 15 cm long. Sepals c. 0.75 mm long. Petals absent. Stamens 4. Silicula bluntly obovate, 4–5 mm long, 3–3.5 mm wide, valves carinate in the proximal quarter and broadly winged distally, emarginate, vesiculate-papillose, reticulate and concave adaxially due to the incurved, obtuse wings which form a notch c. one-tenth of the length of the silicula; wing margins sparsely papilose; pedicels 2–3 mm long, flattened, c. 0.5 mm wide, glabrate except for papillose margins, erecto-patent. Seeds c. 1.5 mm long; radicle incumbent.
Recorded from a creek floodplain, growing in native grassland, and in a depression with little vegetation in grassland. Occupies sites subject to winter inundation. See Scarlett (2001) for further details on habitat and ecology.
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