2n = 36

Plants polycarpic, height in flower (160–)350–600 mm. Caudex branched, 65–300 mm long, leaf scars conspicuous, stolons usually present. Root 2.9–4.5 mm diam. at stem base. Flowering stems terminal and lateral, 4–6 per plant, largest flowering stem 2.5–5.5 mm diam. at base, 2.3–3.1 mm diam. when dry, stem colour tinted crimson, brown, or bronze, lateral flowering stems erect, flowering stem leaves 2–7 pairs per stem, lowest pedicels from halfway up flowering stem or near apex of flowering stem. Rosette of leaves not distinct or distinct from flowering stem leaves; leaves elliptic or obovate, 18–61 mm long, (7.9–)12.7–21 mm wide, green or tinted crimson below, or slightly bronze-tinted, glossy, flat or slightly V-shaped, recurved or not, with lateral veins impressed on adaxial leaf surface; leaf apex apiculate or rounded; petiole absent or indistinct, 3.5–5.5 mm wide at leaf base. Flowering stem leaves ovate or obovate as for rosette leaves but sessile and almost amplexicaul, c. 19 × 12 mm. Pedicels 1 or 2 per leaf axil, (12–)19–35 mm long, 1.1–1.4 mm diam., 0.45–0.55 mm diam. when dry. Flowers (6–)13–30(–42) per plant, (19–)21–24 mm long, rarely female. Calyx (7.9–)10.5–12.7 mm long, green, hairs at calyx–corolla fusion line present; lobes 6.6–9.4 mm long, (2.9–)3.5–3.7 mm wide at base, plane, apices acute, margins smooth, sinus hairs absent, sparse, or abundant. Corolla (16–)19–24 mm long; tube yellow or yellow-green, 4.6–7.2 mm long; lobes white with veins uncoloured, (11.3–)14.3– 18.1 mm long, (7.5–)11.2–12.5 mm wide, hairs below sinus present; nectary 1.2–2.2 mm from corolla base, dark yellow. Filaments (9.0–)10.5–11.5 mm long from corolla base, (1.2–)1.5–1.7 mm wide. Anthers 2.8–3.9 mm long, anther wall bluish purple, mouth yellow, extrorse at anthesis; pollen yellow. Stigma colourless. Ovules 44–84 per ovary, ovary yellow in maturity. Capsule 20–23 mm long. FL Feb–Mar.

Gentianellae montanae similis et affi nis, sed habitu robustiore, caudice longo, ramoso, caulibus hornotinis adventitiis ex caudice orientibus, nervis foliorum medianis atque lateralibus supra impressis, antheris magnis, 2.8–3.9 mm longis, discrimine singulari inter congeneres novozelandicos coloris tubi corollini flavi differt.