Coriaria pottsiana | |
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Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Cucurbitales |
Family: | Coriariaceae |
Genus: | Coriaria |
Species: | C. pottsiana |
Binomial name | |
Coriaria pottsiana | |
Coriaria pottsiana, commonly called the Hikurangi tutu or Pott's tutu, is a rare low-growing sub-alpine perennial summer-green shrub, only known to exist on a small grassy scree slope behind the tramping hut on Mount Hikurangi in the Gisborne Region of New Zealand's North Island. [1] [2] [3] The Mount Hikurangi tramping hut is found at 37°54′22″S178°3′31″E / 37.90611°S 178.05861°E . [4]
The delicate shrub grows to a height of 50 cm (20 in), with a 1 m (3.3 ft) spread. [2] It is rhizomatous, with slender four-sided 40 cm (16 in) stems growing from its slender rhizomes. [2] [3] [5] Branches and branchlets are very slender, with small crinkled oblong to broad oval-shaped dark red opposite leaves with wavy margins that sometimes end in a distinct rounded point, are 5–9×4–9 mm (0.20–0.35×0.16–0.35 in) in size, are truncate at their base, are distant, have purplish undersides, and have slender petioles hardly 0.5 mm (1⁄50 in) in length. [2] [3] Its racemes are 4–14 cm (1.6–5.5 in) long, and are found at the tip of stems, or elsewhere on main branches. [3] Its white flowers, found on slender pedicels up to 7 mm (0.28 in) in length, are distant, with broadly oval sepals about 1.5 mm (0.059 in) in size (sometimes toothed), similar petals, and 5 ribbed carpels. [2] [3]
Like all Coriaria species, the plant is poisonous, especially the seed inside the small black berries. [5] However, the juice of some Coriaria berries is not poisonous, and was used by Māori, who called members of the genus "tutu". [6]