Protologue Description: V. NODOSA. Acaulescent, the rather ample foliage and long peduncles from stout horizontal more or less branching and strongly knotted rootstocks: herbage light green, hirsutulous, the petioles and peduncles very strongly so and the hairs spreading or deflexed: leaves from round-reniform to round-ovate, obtuse, subserrate-crenate, about 2 inches wide at time of petaliferous flowering, the undeveoloped ones cucullate, all much shorter than their petioles: peduncles equalling or exceeding the leaves, rather slender, bibracteolate near the middle , the pubesence rigid and retrorse: sepals lanceolate, puberulent, the margin more or less obscurely ciliolate: corolla pale-violet, three quarter inch broad; uppermost petals obovate, naked, the laterals with a dense tuft of apparently flattened and distinctly wooly hairs, the odd one as long as the others and broadly spatulate.
Near Syracuse, New York, communicated by Homer D. House. Related to such species as V. cuspidata, V. Dicksonii and V. laetecaerulea, and remarkable for its large knotted and exactly horizontal rootstocks, the woolly-hairiness of its petals, and the retrorsely almost hispid peduncles.