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Cunninghamia beardii
Cunninghamia beardii Buczk., Stockey, B. Atk., G.W. Rothwell Int. J. Pl. Sci., 177(1): 000. 23 Nov 2015
- Name
- Cunninghamia beardii
- Rank
- Species
- Generic Name
- [Genus] Cunninghamia
- Authors (Pub.)
- Buczkowski E. L.
Stockey R. A.
Atkinson B. A.
Rothwell G. W.
- Publication
- Cunninghamia beardii sp. nov. (Cupressaceae: Cunninghamioideae), anatomically preserved pollen cones from the Eocene of Vancouver Island, British Columbia, Canada [2015/11]
- Journal
- International Journal of Plant Sciences
- Volume
- 177
- Issue
- 1
- Page number
- 000
- Year
- 2015
- Fossil Status
- leafy twigs (with male cones & pollen)
- Stratigraphy
- Eocene
- Location
- Appian Way, Vancouver Island, British Columbia, Canada
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- Royal British Columbia Museum, Victoria, British Columbia, Canada
- Repository Number
- AW 358 A bot, B1 top, B1 bot.
- Diagnosis
- Cluster of at least 18 pollen cones, subterminal on leafy branch, helically arranged. Ultimate leafy branch terminating in scale leaves, significantly increasing in diameter where pollen cones attached. Leafy twig with parenchymatous pith surrounded by cylinder of secondary xylem, parenchymatous cortex with numerous resin canals, hypodermis of thick-walled cells. Vegetative leaves amphistomatic, with large central resin canal abaxial to vascular bundle, elongate zone of transfusion tissue, nonplicate mesophyll, hypodermis three to four cells thick. Pollen cones at least 2 mm in diameter, produced in axil of bract; three scale leaves surrounding base of cone axis. Microsporophylls helically arranged. Pollen sacs abaxial, three per microsporophyll, elongate. Pollen subspheroidal; exine scabrate, orbiculate, no papilla evident.