Tricyrtis formosana
Tricyrtis formosana, the toad lily, is an East Asian species of herbaceous plant in the lily family. It is native to Taiwan and to Nansei-shoto (also known as the Ryukyu Islands, part of Japan). The Latin specific epithet formosana refers to the former name of Taiwan, Formosa. Description 

Tricyrtis formosana is a rhizomatous herbaceous peennial up to  tall, sometimes branching but sometimes not. The flowers are trumpet-shaped, white or light purple with prominent darker purple spots. Varieties
 Tricyrtis formosana var. formosana - Taiwan, Iriomote
 Tricyrtis formosana var. glandosa (T.Shimizu) T.S.Liu & S.S.Ying - Taiwan

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formosana
Plants described in 1879
Flora of Eastern Asia