Beardia

Name

Beardia

Rank

Genus

Authors (Pub.)

Elliott L. L. Mindell R. A. Stockey R. A.  

Publication

Beardia vancouverensis gen. et sp. nov. (Juglandaceae): permineralized fruits from the Eocene of British Columbia [2006/3]

Journal

American Journal of Botany

Volume

93

Issue

4

Page number

558

Year

2006

Parent Taxon

[Family] Juglandaceae

Fossil Status

fruits (endocarps)

Type

Beardia vancouverensis

Diagnosis

Nutlets flattened in plane of secondary septum, ribbed, wingless, 4.5–7.0 mm long, 5.5–9.0 mm wide, 3–5 mm thick, pedicellate. Nut shape subtriangular in longitudinal view, transversely lenticular. Fruit unilocular, divided by thick primary septum into two main chambers, further partitioned by secondary septum into four chambers at the base. Primary septum one-third to one-half nutshell diameter, secondary septum up to one-third nutshell diameter, lacunae absent. Outer epicarp ,1 mm thick, margin undulating. Vascular strands with scalariform tracheary elements extending into the furrows from the inner to outer epicarp. Inner epicarp 1.5–2.0 mm thick, composed of isodiametric parenchyma and vascular bundles. Epicarp thicker at fruit base, measuring up to 6 mm. Nut wall with longitudinal ridges, tapering towards apex, 0.7–2.0 mm thick, composed of fibers with single outer layer of circular idioblasts. Septation formed by wall intrusion into single locule. Placental vascular bundle in center of primary septum. Embryo folded, dicotyledonous.