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Ulminium kokubunii
Ulminium kokubunii K. Takah., Mits. Suzuki I.A.W.A. J., 24(3): 298. 2003
- Name
- Ulminium kokubunii
- Rank
- Species
- Generic Name
- [Genus] Ulminium
- Authors (Pub.)
- Takahashi K.
Suzuki M.
- Publication
- Dicotyledonous fossil wood flora and early evolution of wood characters in the Cretaceous of Hokkaido, Japan [2003]
- Journal
- IAWA Journal
- Volume
- 24
- Issue
- 3
- Page number
- 298
- Year
- 2003
- Fossil Status
- stems (wood)
- Stratigraphy
- Santonian
- Strat. comment
- Member Uf-Uk, Upper part of the Yezo Group
- Location
- Gakko-no-sawa, Obira-cho, Rumoi County, Hokkaido, Japan
- Paleoregion
- Eurasia (Japanese Archipelago)
Data for Holotypus
- Repository
- Botanical Garden, Tohoku University, Sendai, Japan
- Repository Number
- KK 95511
- Diagnosis
- Growth rings very distinct, marked by difference of vessel size between early wood and late wood and radially flattened fibers in the late wood. Wood semi-ring-porous. Vessels common, 24-32 (mean 26) per square mm; round in cross section; solitary (49%) and in radial multiples of 2 to 4; 45-115 (mean 78) x 55-125 (mean 94) um in tangential x radial diameter; 310-500 (mean 390)pm in vessel element length; perforation plates mostly simple and sometimes scalariform with less than 10 bars; intervessel pits crowded alternate ; polygonal, 6 um in diameter; vessel-ray pits alternate, simple
and round. Imperforate tracheary elements septate fibers with no pits. Axial parenchyma abundant, vasicentric, composed of large cells (20 x 30 um in
cross section) including swollen ones similar to oil cells; no crystalliferous elements observed. Rays up to 3 cells (40 pm) wide; 90-580 um high; generally homocellular, occasionally with one marginal row of upright or square cells; procumbent cell 50 x 25 um in radial x vertical lengths and upright cells 20 x 40 um in radial x vertical lengths; uniseriate ones abundant; no crystalliferous elements observed.
Nomenclatural synonyms (basionyms)
Species
