Gentianella luteoalba Glenny

Plants monocarpic, biennial, height in flower 25–60 mm (rosette of leaves compact, 22– 70 mm diam.). Caudex unbranched, to 55 mm long. Root 2.2–4.4 mm diam. at stem base. Flowering stems terminal, largest flowering stem 3.0–5.0 mm diam. at base, stem colour green or tinted purpleblack, flowering stem leaves 1 pair per stem, lowest pedicels from near base of flowering stem to halfway up flowering stem. Rosette of leaves present but not very distinct or present and distinct from flowering stem leaves, leaves lingulate, 10.5–33 mm long, 4.2–5.2 mm wide, green, margins dark red-brown, channelled, recurved or not, leaf apex rounded; petiole absent, leaf 2.7–5.0 mm wide at base. Pedicels 1 per leaf axil, 1–21 mm long, 1.0–1.3 mm diam. Flowers 14–133 per plant, 12.5–19.5 mm long. Calyx 6.7–8.4 mm long, green, tinted brown, hairs at calyx–corolla fusion line present; lobes 4.8–5.9 mm long, 2.2–2.9 mm wide at base, plane, apices acute, margins smooth or minutely denticulate at lobe base or for full length of margin, sinus hairs sparse to abundant. Corolla 11.6–14.9 mm long, uniformly pale yellow; tube 3.8–4.7 mm long; lobes 9.2–10.2 mm long, 5.1–6.3 mm wide, hairs below sinus present; nectary 1.5–2.0 mm from corolla base. Filaments 7.8–9.9 mm long from corolla base, 0.6–0.8 mm wide. Anthers 1.0–2.1 mm long, anther wall blue-black, mouth yellow, extrorse at anthesis; pollen yellow. Stigma colourless. Ovules 9–20 per ovary, ovary turning slightly blue in maturity. Capsule 5.6–7.5 mm long. FL Feb–Mar.

[Reproduced from Glenny (2004, New Zealand J. Bot. 42: 361-530) with permission from The Royal Society of New Zealand.]