Plants 20–40 cm. high.. Rhizome short; roots thick, spongy, with elongated distal tubers.. Leaves drying black, rosulate, petiolate, obovate-lanceolate to oblong-lanceolate, truncate to cordate, 6–19 cm. long, 3–7 cm. wide; margins wavy with minute teeth.. Peduncle terete, 8–20 cm. long, glabrous.. Inflorescence paniculate to unbranched and lax; bracts supporting the branches (and floral bracts) relatively small, lower ones up to 15 mm. long.. Pedicels articulated above the middle, 8–10 mm. long, 2–4-nate at the lower nodes.. Perianth greenish white; tepals 4–6 mm. long, 3-veined.. Stamens as long as the perianth; filaments papillate-rough, longer than the anthers.. Style filiform, exserted.. Capsule deeply triquetrous, 3–4 mm. long, 4–8 mm. wide.. Seeds flat, 2.5–3 mm. in diameter.
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