Trochodendron rosayi Manchester, Pigg et DeVore

Plant Fossil Names Registry Number: PFN000100


Authors: S. R. Manchester, K. B. Pigg & M. L. DeVore

Rank: species

Reference: Manchester, S. R., Pigg, K. B. & DeVore, M. L. (2018): Trochodendraceous fruits and foliage in the Miocene of western North America. – Fossil Imprint 74(1–2): 45–54.

Page of description: 46

Illustrations or figures: text-fig. 2a–d


Original diagnosis/description

Fruits turbinate to subglobose capsules, broadly rounded apically, tapered basally, with about 10 persistent styles arising about 2/3 of the distance from base to apex. Styles straight to curving outward (convexly). Pedicels slender, ca. twice as long as the fruit length. Capsule surface mostly smooth, opening apically with radiating loculicidal slits, a slit arising above each style and joining with other slits to form a large, polygonal aperture at fruit apex when
dehiscing. Nectaries flattened, triangular, extending from the equatorial region of the fruit to the base of each style. Stamen scars numerous (ca. 25 in total) scattered in a broad band at the junction between pedicel and expanded part of the fruit body.


This species is named in honor of Robert Rosé (pronounced “Rosay”) who collected and donated the specimens.


Neogene, Miocene
Middle Miocene
Type horizon: Little Butte Volcanic Series


United States
Moose Mountain near Cascadia, Oregon (UF locality 18110, 44° 26.5790′ N, 122° 18.9570′ W)

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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