Wikstroemia uva-ursi with unripe fruitWikstroemia gemmata
Gampi or Ganpi[1] are a group of Japanese shrubs, members of the genus Wikstroemia, some of which have been used for making paper since the 8th century.[2] It is used to make the high quality washi paper, as are kōzo and mitsumata trees.[3]
Various sources have identified Gampi or Ganpi as:
Wikstroemia albiflora Yatabe: known as Miyama ganpi in Japan.[4]
Wikstroemia canescens (Wall.) Meisn.[1] (syn. Diplomorpha canescens[5]): a south Asian plant
Wikstroemia diplomorpha:[6] not a valid systematic name
Wikstroemia ganpi (Siebold & Zucc.) Maxim.: known as Ko ganpi in Japan[4]
Wikstroemia kudoi Makino: Endemic to Kyushu (Yakushima). Known as Shakunan-ganpi in Japan.[7]
Wikstroemia pauciflora (Franch. & Sav.) Makino: known as Sakura ganpi in Japan[4]