Gentianella calcis subsp. taiko
Vascular – Native
Dicotyledonous Herbs other than Composites
2n = 36
Current conservation status
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2017 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2012 and replaces all previous NZTCS lists for vascular plants. Authors: By Peter J. de Lange, Jeremy R. Rolfe, John W. Barkla, Shannel P. Courtney, Paul D. Champion, Leon R. Perrie, Sarah M. Beadel, Kerry A. Ford, Ilse Breitwieser, Ines Schönberger, Rowan Hindmarsh-Walls, Peter B. Heenan and Kate Ladley.
2012 | Threatened – Nationally Critical | Qualifiers: EF, OL
Previous conservation statuses
2009 | Threatened – Nationally Critical | Qualifiers: OL, EF
2004 | Threatened – Nationally Critical
Endemic. South Island, near Pareora (Limestone Valley Road)
In lowland areas. A limestone endemic confined to shaded sites on limestone bluffs and boulders, and associated rendzina soils
Perennial tufted herb. Petiole distinct, 15-50 mm long. Rosette leaves narrowly elliptical 42-75 mm long, 4.4-8.8 mm wide, green, weakly V-shaped in cross-section, slightly recurved, apex acute to obtuse; margins minutely serrulate. Cauline leaves, linear, recurved, smaller than rosette leaves. Flowering stems, purple-black, 1-5 per plant. Pedicels 6.5-12 mm long, 0.75-0.9 mm diam. Flowers 28-65 per plant, 1-18 per flowering stem, 16-18 mm long. Calyx green, tinted purple black, 6.8-9.8 mm long, green tinted purple; lobes 4.5-7.2 mm long, 1.3-1.8 mm wide at base, strongly recurved, apices acute, margins minutely serrulate. Corolla 11.7-19.0 mm long, veins colourless; tube 3.6-4.7 mm long; lobes 7.8-14.3 x 3.6-6.9 mm, margins usually toothed; nectary 0.8-2.2 mm from corolla base, V-shaped to pocket-like with distinct smooth-margined flap. Filaments 6.5-9.4 mm long from corolla base, 0.40-0.65 mm wide. Anthers 1.5-2.2 mm long. Ovules 14-24 per ovary. Capsules 13-16.5 mm long.
Distinguished from the other subspecies of G. calcis Glenny et Molloy by its wide leaves (4.4-8.8 mm). Also the leaves are rather long and only slightly V-shaped in cross-section. Secondary branching of the flowering stems is minimal. The corolla is rather large (14.6-19 mm long), uniformly white, and the nectary flap has an untoothed margin. For differnces from G. astonii T.N.Ho et S.W.Liu see under G. calcis
Difficult. Should not be removed from the wild.
Under severe threat from the spread of Hieraceum pilosella L. and pasture grasses, habitat loss due to changes in stocking regimes, and through browsing from feral goats. Limestone quarrying is a long-term threat, while the very small population is vulnerable to erosion, boulder and rock falls. Previously recorded as Gentiana aff. astonii (b) (CHR 529111; Pareora River) in de Lange et al. (2004).
gentianella: Little Gentiana (named after Gentius, 6th century king of Illyria, who found the roots of the yellow gentian to have a healing effect on his malaria-stricken troops)
Where To Buy
Not Commercially Available
Description modified from Glenny (2004)
References and further reading
de Lange et al., 2004, Threatened and uncommon plants on New Zealand, New Zealand Journal of Botany 42: 45-76.
Glenny, D. 2004: A revision of the genus Gentianella in New Zealand. New Zealand Journal of Botany 42: 361-530.