Allenbya Cev.-Ferriz et Stockey

Plant Fossil Names Registry Number: PFN001168

Act LSID: urn:lsid:plantfossilnames.org:act:1168

Authors: S. R. S. Cevallos-Ferriz & R. A. Stockey

Rank: genus

Reference: Cevallos-Ferriz, S. R. S. & Stockey, R. A. (1989): Permineralized fruits and seeds from the Princeton Chert (Middle Eocene) of British Columbia: Nymphaeaceae. – Botanical Gazette 150(2): 207–217., link

Page of description: 208

Type

Original diagnosis/description

Follicle-like fruit; carpel with at least four ovules; exocarp single layered, cells rectangular; mesocarp ca. eight cells thick, cells rectangular; endocarp single layered, cells rectangular. Seeds ovoid, anatropous, operculate, 6.0–7.0 mm × 3.0–3.5 mm; with two integuments. Outer integument a palisade of thick-walled cells, sinuous in longitudinal section and surface view, with four to 10 undulations per cell in surface view; underlain by one to two thin-walled rectangular cells. Inner integument of one to two rectangular thin-walled cells attached to the outer integument only at chalaza. Operculum (cap) composed of radially elongate, thin-walled cells; hilum adjacent to micropyle at apex of operculum. Vascular tissue beneath palisade of outer integument extends from hilum to chalaza forming an external raphal ridge. Perisperm present.

Etymology

The genus is named after the abandoned mining town of Allenby from which the Allenby Formation also takes its name.