Cheeseman's account is: "A perennial herb with tufts of radical leaves, emitting short thick stolons terminating in other tufts, glabrous in all its parts. Leaves numerous; petiole 2–4 in. long or more, filiform, terete, dilated towards the base; blade 1/4–3/4 in. long, ovate or ovate-oblong, obtuse, suddenly contracted into the petiole, rather thin; main veins 3–5, parallel, with reticulating veinlets between. Flowers crowded at the bases of the petioles, sessile, minute. Calyx 1/10 in. long or less, tipped with 5 minute teeth. Corolla altogether included in the calyx, shortly 5-lobed. Stamens 4, inserted on the corolla-tube. Style short; stigma capitate. Capsule included within the persistent calyx, 1/10-⅛ in. diam., globose, rupturing irregularly. Seeds very numerous; testa reticulated."
[From: Allan (1961) Flora of New Zealand. Volume 1.]