Bognerospadix speirsiae Stockey, G.L.Hoffman et G.W.Rothwell

Plant Fossil Names Registry Number: PFN002113


Authors: R. A. Stockey, G. L. Hoffman & G. W. Rothwell

Rank: species

Genus: Bognerospadix Stockey, G.L.Hoffman et G.W.Rothwell

Reference: Stockey, R. A., Hoffman, G. L. & Rothwell, G. W. (2021): Fossil evidence for Paleocene diversification of Araceae: Bognerospadix gen. nov. and Orontiophyllum grandifolium comb. nov.American Journal of Botany 108(8): 1417–1440.

Page of description: 1421

Illustrations or figures: figs 4, 5A–H, J, L, 6A, B

Name is type for

Bognerospadix Stockey, G.L.Hoffman et G.W.Rothwell 2021


Holotype UAPC-ALTA S43,255A, B, University of Alberta (UAPC-ALTA), Edmonton, Canada
Figures: figs 4, 5A–H, 5J, L

Note: Holotype is formed by part and counterpart.

Paratype: UAPC‐ALTA S15,286, S15,288 (part and counterpart); University of Alberta Paleobotanical Collection (Figure 6A, B).

Original diagnosis/description

Spadix more than 4 cm long, ~1 cm wide; 4–5 rows of flowers in surface view. Flowers/fruits 2.0–2.2 mm wide, 3.4–3.8 mm long. Seeds slightly curved, tapering toward micropyle; ~0.9–1.2 mm long by 0.6 mm wide, with integument 70–120 µm thick, of several layers of isodiametric sclereids; verrucose externally.


The species is named in honor of the late Alice Elizabeth (Betty) Speirs of Red Deer, Alberta, Canada, who collected most of the specimens studied in this investigation, and many thousands of additional specimens from localities in the Red Deer area. Her generous donations of fossils to Alberta repositories and openness in sharing data are greatly appreciated by all who knew her.


Paleogene, Paleocene
Paskapoo Formation


exposures along both banks of the Blindman River and the northwest bank of the Red Deer River in the area around their confluence southeast of the town of Blackfalds in south-central Alberta, Canada (52°21′18″N, 113°45′00″W)

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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