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Carex aboriginum
Carex aboriginum is a species of sedge endemic to Idaho in the western United States, known as Indian Valley sedge. It was not observed in the wild between 1910, when it was first described, and 1999. Until its rediscovery, C. aboriginum was considered the only plant native to Idaho to have become extinct, and it remains one of the state's rarest and most endangered plant species.
Carex aboriginum is only known from eight sites near Council, Idaho, at altitudes of 2,875–4,445 feet (876–1,355 m). Its total range is around 25 miles (40 km) long and 10 miles (16 km) wide. The area around Indian Valley is not a significant center of endemism, although it does house one other endemic taxon – Allium tolmiei var. persimile. There are, however, taxa in other families with very restricted distributions that are only found on the kinds of dry gumbo soils that are found in Indian Valley.
Carex abitibiana · Abruptbeak sedge · Thicket sedge · Small Dusky Sedge · Seoul Sedge · Acid Loving Sedge · Carex acocksii · Slender Tufted-sedge · Carex acutata · Lesser pond sedge · Circumpolar sedge · Carex adrienii
Text excerpted from the Wikipedia article Carex aboriginum by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
