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Betula nipponica
Betula nipponica Tanai J. Fac. Sci. Hokkaido Univ., Ser. 4, Geol., 11(2): 288. 20 Mar 1961
- Name
- Betula nipponica
- Rank
- Species
- Generic Name
- [Genus] Betula
- Authors (Pub.)
- Tanai T.
- Publication
- Neogene floral change in Japan [1961/3]
- Journal
- Journal of the Faculty of Science of the Hokkaido University
- Volume
- 11
- Issue
- 2
- Page number
- 288
- Year
- 1961
- Parent Taxon
- [Genus] Betula
- Fossil Status
- leaves
- Stratigraphy
- Miocene
- Location
- Yoshioka, Fukushima-cho, Matsumae-gun, Hokkaido, Japan
- Paleoregion
- Eurasia (Japanese Archipelago)
Data for Holotypus
- Repository
- National Museum of Nature and Science, Palaeobotany Collection, Tokyo, Japan
- Repository Number
- UHR-15145
- Diagnosis
- Leaves ovate to oblong-ovate in general outline, 4.5 to 7 cm long and 2,2 to 3.9 cm wide; base rounded and slightly cordate; apex acuminate to acutely pointed; midrib stout, straight to the tip ; seeondary nerves 9 to 11 pairs, opposite to subalternate, Tegularly spaced, diverging from the midrib at angles of 35 to 40 degrees on the middle part of blade, nearly straight, entering into smaller marginal teeth; tertiaries among intersecondary spaces thjn, irregularly percurrent; nervilles indistinct, reticulate; margin deeply double serrate, with acute teeth; texture thin, membranaceous; petiole rather slender, more than 4 mm long,
