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Hidakasanmyaku Erimo Tokachi NP, Hokkaido
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Only about 30 flowering Poroshiri-ogi were counted on a limestone cliff at Poroshiri in 2024. Described as a new species in 2026, it is known from one tiny site; researchers recommend Critically Endangered status.
The alpine plant O-niku parasitizes Miyama alder roots and flowers only once in its life. A Ministry of the Environment ranger recorded it among Poroshiri’s July blooms.
Geologists infer Seven Ponds Cirque’s glaciers peaked 50,000–40,000 years ago, earlier than major advances in Europe and North America. Alpine flowers now carpet this Ice Age bowl.
Botanists describe 2 neighboring alpine habitats around Poroshiri: moist snowbed communities in the cirques and dry, rocky-gravel vegetation on exposed ridges.
Uzuraba-hakusan-chidori has leaves mottled like quail eggs, unlike the plain leaves of Hakusan-chidori. A ranger recorded both among Poroshiri’s July blooms.
