| Gentianella cerina | |
|---|---|
 | |
| Plate XXXVI [1] | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Gentianales |
| Family: | Gentianaceae |
| Genus: | Gentianella |
| Species: | G. cerina |
| Binomial name | |
| Gentianella cerina | |
| Synonyms [4] | |
Chionogentias cerina(Hook.f.) L.G.Adams Contents | |
Gentianella cerina (common name - Auckland Island gentian) [3] is a plant species in the Gentianaceae family, endemic to the Auckland Islands of New Zealand. [3] [4]
Gentianella cerina has a thick trunk (caudex) which may be unbranched or branched and of a height from 110–200 mm. There are 3–12 flowering stems per plant (1.1–3.1 mm in diameter) and these may be terminal or lateral. The lateral flowering stems spread horizontally with the ends growing upwards (i.e., they are decumbent). The leaves are elliptic, 36.6–53.1 by 8.4–12.6 mm) and are flat, with thickened margins. The leaf apex is rounded and the distinct petiole is 11–13 mm by 4.7–6.3 mm. Leaves on flowering stems are the same but smaller. There are 15 to more than 100 flowers per plant, which are 9.9–14.1 mm long. The calyx is 9.3–12.2 mm long and there are hairs at calyx–corolla fusion line. The corolla is 8.4–11.8 mm long, and white or tinted red to purple, with colourless or purple veins. The tube is 2.1–4.4 mm long and the lobes are 6.3–8.8 by 3.8–5.0 mm. The pollen is yellow and the stigma is purple or colourless. There are 13–37 ovules per ovary, and the capsule is 6.5–12 mm long. It flowers from December to April. [3]
It was first described in 1844 by Joseph Dalton Hooker as Gentiana cerina. [5] [1] Its currently accepted name is Gentianella cerina, having been assigned to the genus Gentianella by the authors, Ho and Liu in 1993. [5] [6]
In both 2009 and 2012 it was deemed to be "At Risk - Naturally Uncommon" under the New Zealand Threat Classification System, [3] and this classification was reaffirmed in 2018, due to the species being an island endemic and having a restricted range. [2]
Gentianaceae is a family of flowering plants of 103 genera and about 1600 species.
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Anisotome antipoda is a species of flowering plant in the family Apiaceae, which is endemic to the Auckland, Campbell and Antipodes Islands.
Abrotanella rosulata is a plant in the family Asteraceae, endemic to the Campbell Islands.
Myosotis capitata is a species of forget-me-not native to the Campbell and Auckland Islands. Joseph Dalton Hooker described the species in his 19th century work Flora Antarctica.
Marsippospermum gracile, common name - alpine rush, is a flowering plant species in the rush family Juncaceae which is native to New Zealand.
Oreobolus pectinatus is a species of flowering plant in the sedge family that is native to the subantarctic islands, and to the North and South Islands of New Zealand. The specific epithet derives from the Latin, pectin/pectinis,, and refers to the leaves.
Antirrhinum hispanicum, the Spanish snapdragon, is a species of flowering plant belonging to the genus Antirrhinum that is native to southeastern Spain.
