A large population of Polygala tatarinowii Regel (Polygalaceae) around Abukuma Limestone Cave in Fukushima Prefecture, Japan

Abstract

A population of Polygala tatarinowii Regel, an endangered annual herb in Japan, was found near Abukuma Limestone Cave, Tamura City, Fukushima Prefecture, Japan. It could be one of the largest population of the species in Japan, where more than a thousand plants grew on dry meadows beneath limestone bluff or on the flower garden surrounding the Limestone Cave.