Sabal imperialis Dawson

Plant Fossil Names Registry Number: PFN003277

Act LSID: urn:lsid:plantfossilnames.org:act:3277

Author: J. W. Dawson

Rank: species

Reference: Dawson, J. W. (1883): On the cretaceous and Tertiary floras of British Columbia and the North West Territory. S.N.: 15–34.

Page of description: 26

Illustrations or figures: fig. 23

Other combinations

Types

Original diagnosis/description

Midrib elongate : more than 16 centimetres long and 1.8 wide; coarsely striate longitudinally, perhaps in consequence of pressure. Leaf having folds varying from 8 to 15 millimetres in breadth, at angle of 55° to 60° at base, more acute upward. Nerves fine, 30 to 60 on each fold, five or six on each side of the middle being coarser than the others. General form and margin unknown, but must have been one to two feet or more in diameter of blade.

Emended diagnosis

Pinnate-entire palm leaves with a narrow rachis flaring basally, the lamina large; segments attached (connate) for ~60–100% of segment length, decurrent with rachis, plication reduplicate. Petiole unarmed.

in Greenwood, D. R., Conran, J. & West, C. K. (2022): Palm fronds from western Canada are the northernmost palms from the Late Cretaceous of North America and may include the oldest Arecaceae. – Review of Palaeobotany and Palynology 301: 104641 (1–20).

Stratigraphy

Cretaceous, Upper Cretaceous, Campanian
Extension Formation

Locality

Canada
Harwood Colliery, Nanaimo, Vancouver Island, British Columbia