Mannia pilosa (Aytoniaceae, Marchantiophyta) — new to the Japanese Flora

• Published in: Bryophyte Diversity and Evolution
• Main Authors: Katagiri, Tomoyuki, Masuzaki, Hiroaki, Masuzawa, Takehiro, Deguchi, Hironori
• Format: Article in Journal/Newspaper
• Language: English
• Published: Magnolia Press 2010
• Subjects: alpine meadow; glacial relict; Japan; limestone outcrops; Mannia pilosa; Mt. Kitadake; Arctic
• Online Access: http://www.mapress.com/j/bde/article/view/bde.31.1.13; https://doi.org/10.11646/bde.31.1.13

Mannia pilosa (Hornem.) Frye & L.Clark, a circumpolar species widely distributed in arctic-alpine regions was newly found from Mt. Kitadake, with its 3192 m peak the second highest mountain in Japan. Plants of M. pilosa were growing in an alpine meadow on a limestone outcrop about 400 m south of the peak at 35°40’ N, 138º 14’ E, ca. 3000 m alt. The isolated Japanese population for M. pilosa seems to be a glacial relict. New information on spore morphology using SEM and habitat of the Japanese plants is provided.