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Oreostylidium subulatum

Oreostylidium subulatum
Photo: Author: Johannes Mildbraed, PD-US

Oreostylidium subulatum is a tiny, tufted New Zealand alpine plant from the Stylidiaceae family, the only species in its genus. It is grown mainly by specialist alpine and carnivorous plant enthusiasts, and it needs cool, moist, well-drained conditions.

Family
Stylidiaceae (Stylidi family)
Light
Full sun, Part shade
Water
Keep the soil evenly moist during the growing season and avoid waterlogging.
Soil
Gritty, free-draining mix with added grit or sand.
Temperature
5–20 °C; tolerates cold alpine winters but should be protected from prolonged heat above 25 °C.
How easy
Hard

About

Oreostylidium is a genus of flowering plants in the family Stylidiaceae with a single species, Oreostylidium subulatum, that is endemic to New Zealand. O. subulatum is a very small plant with small, white flowers. It has a complicated botanical history that has led to a few proposals to move Oreostylidium to the related genus Stylidium. The researchers cite molecular data and suspect that this species is an extreme example of floral paedomorphosis. This would not be an unprecedented move since the single species was initially described as Stylidium subulatum in 1864 and later moved to its own genus by Sven Berggren in 1878. It possesses the same kind of glandular trichomes underneath the flower that make Stylidium species carnivorous plants, but it has not yet been tested for the presence of digestive enzymes.

Where it grows

Oreostylidium subulatum is endemic to montane and subalpine regions of New Zealand, but the range is not as extensive as the other Stylidiaceae genera found in New Zealand. Good (1925) in a review of the geographical distribution of Stylidiaceae noted that O. subulatum is confined to the South Island, though earlier reports place some specimens near Mount Ruapehu on the North Island. On the South Island, it was reported as existing at Swampy Hill near Dunedin and The Grampians near Nelson, New Zealand.

Text excerpted from the Wikipedia article Oreostylidium by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

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