Ulmus okanaganensis

Name

Ulmus okanaganensis

Rank

Species

Generic Name

[Genus] Ulmus

Authors (Pub.)

Denk T. Dillhoff R. M.  

Publication

Ulmus leaves and fruits from the Early–Middle Eocene of northwestern North America: systematics and implications for character evolution within Ulmaceae [2006/3]

Journal

Canadian Journal of Botany

Annee/Jahrgang

2005

Volume

83

Issue

12

Page number

1665

Year

2006

Fossil Status

leafy stems (with reproductive organs)

Stratigraphy

Ypresian

Strat. comment

49 ± 2 and 52 ± 2 Ma

Location

McAbee, One Mile Creek, British Columbia, Canada

Paleoregion

America (North)

Data for Holotypus

Repository

Burke Memorial Washington State Museum, University of Washington, Seattle, USA

Repository Number

UWBM 97766 (McAbee)

Num

Figs. 5G, 5H

Pub.

Ulmus leaves and fruits from the Early–Middle Eocene of northwestern North America: systematics and implications for character evolution within Ulmaceae [2006/3]

Data for Paratypus

Repository

Burke Memorial Washington State Museum, University of Washington, Seattle, USA

Repository Number

UWBM 97673, UWBM 97765, UWBM 97773, UWBM 97774, UWBM 97775, UWBM 97776, UWBM 97777, UWBM 97778, UWBM 97779, UWBM 97782, UWBM 97783, UWBM 97784, UWBM 97785 (McAbee); UWBM 77360A, UWBM 52179, UWBM 54165, UWBM 97781, UWBM 97787, UWBM 97788 (One Mile Creek); UWBM 97780; SR 98-10-35 (Republic) - Stonerose Museum, Republic, Washington, USA

Diagnosis

Leaf blade oblong–elliptic to (narrow) ovate, petiolate, base cordate, asymmetric or equal, sometimes auriculate, apex acute, margin simple to double serrate, teeth triangular, tooth apex blunt to acute, basal and apical side convex, sigmoid, or straight, rarely concave, primary vein straight, thick, secondary veins simple or branched, abmedial branches of secondary veins 1–3, secondaries and abmedial veins inserting teeth, tertiary veins perpendicular to secondary veins, percurrent or branching; fertile twigs distichous displaying a zigzag course, leaves alternate, nodes swollen, flower fascicles with numerous flowers in axils of leaves of the current year, occurring together with the leaves, fruits with pedicels, no pedicel articulation visible, endocarps small, without wings, elliptic–obovate, with two persistent styles, perianth lobed, small.