CR

Schiedea trinervis

Declining

Overview

Schiedea trinervis is a species of flowering plant in the family Caryophyllaceae. It is called three nerved alsinidendron and is endemic to island of Oʻahu in Hawaii. It is a subshrub, reaching a height of 30–80 cm (12–31 in).

Schiedea trinervis faces severe population decline due to habitat destruction from invasive plant species, particularly fountain grass and other non-native vegetation that outcompete this endemic Hawaiian species. Feral ungulates, especially goats and pigs, trample and browse the remaining populations while degrading the fragile dry forest ecosystem. Urban development and agricultural expansion have eliminated much of its historical range on the leeward slopes of Hawaiian mountains.

Threat summary

Habitat

Schiedea trinervis inhabits dry to mesic forests and shrublands on volcanic slopes, typically found in rocky outcrops and cliff faces between 300-1,200 meters elevation. This Hawaiian endemic requires well-drained soils in areas with moderate rainfall and is adapted to the unique microclimates of leeward mountain slopes.

Forest· major

Conservation measures underway

Site/area protectionSpecies recoveryEx-situ conservation

Frequently asked questions

Why is Schiedea trinervis classified as Critically Endangered?
Schiedea trinervis is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Schiedea trinervis faces severe population decline due to habitat destruction from invasive plant species, particularly fountain grass and other non-native vegetation that outcompete this endemic Hawaiian species. Feral ungulates, especially goats and pigs, trample and browse the remaining populations while degrading the fragile dry forest ecosystem. Urban development and agricultural expansion have eliminated much of its historical range on the leeward slopes of Hawaiian mountains.
Where does Schiedea trinervis live?
Schiedea trinervis occurs in United States. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Schiedea trinervis?
The main threats to Schiedea trinervis are 11.1, 5.3, 6.2, and 8.1. The full IUCN-classified threat record for this species is detailed on the species page.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.