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Picea burtonii
Picea burtonii Klymiuk, Stockey Amer. J. Bot., 99: 1070. 23 May 2012
- Name
- Picea burtonii
- Rank
- Species
- Generic Name
- [Genus] Picea
- Authors (Pub.)
- Klymiuk A. A.
Stockey R. A.
- Publication
- A Lower Cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae) [2012/5]
- Journal
- American Journal of Botany
- Volume
- 99
- Page number
- 1070
- Year
- 2012
- Fossil Status
- cones (female)
- Stratigraphy
- Valanginian
- Strat. comment
- Longarm Formation
- Location
- Apple Bay locality of northern Vancouver Island, Canada
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- University of Alberta, Department of Geology, Edmonton, Canada
- Repository Number
- UAPCALTA P16098 Bbot, Bxs, and Ctop
- Diagnosis
- Seed cone, at least 3.2 cm long and 0.5 cm in diameter, cylindrical. Bract-scale complexes helically arranged. Pith parenchymatous with scattered sclereids. Vascular cylinder endarch, continuous; 8–10 tracheids wide. Secondary xylem tracheids with helical and scalariform thickenings. Cortex mostly parenchymatous with scattered sclerenchyma and 12–15 resin canals. Vascular traces to ovuliferous scale abaxially concave; terete bract trace arising separately from vascular cylinder. Bract 0.6– 0.7 mm long, triangular in cross section, with two lateral resin canals; separating from ovuliferous scale at lateral margins. Ovuliferous scale at least 1.13 mm long and borne perpendicular to cone axis; resin canals both abaxial and adaxial to vascular strands throughout and also between vascular strands distal to seed body. Seeds two per scale, winged.
