Tufted wind-dispersed fagalean fruits, Pogonokarydion gen. nov., from the Upper Eocene Florissant Formation of Colorado, USA
Wind-dispersed comose fruits from the Late Eocene of Florissant, Colorado, USA, are recognized as a new genus of fagalean affinity. Pogonokarydion crassulum (Cockerell) gen. et comb. nov. disseminules consist of an ellipsoidal to circular nut bearing longitudinal ribs, a persistent epigynous peria...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
W. Szafer Institute of Botany, Polish Academy of Sciences
2024-12-01
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| Series: | Acta Palaeobotanica |
| Subjects: | |
| Online Access: | https://acpa.botany.pl/Tufted-wind-dispersed-fagalean-fruits-Pogonokarydion-gen-nov-from-the-Upper-Eocene,194297,0,2.html |
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| Summary: | Wind-dispersed comose fruits from the Late Eocene of Florissant, Colorado, USA, are recognized as
a new genus of fagalean affinity. Pogonokarydion crassulum (Cockerell) gen. et comb. nov. disseminules consist
of an ellipsoidal to circular nut bearing longitudinal ribs, a persistent epigynous perianth, paired styles, and
a prominent tuft of straight hairs arising from the base, which we infer to be homologous with an involucre.
Prior assignments to Juncus (Juncaceae) and Fagopsis (Fagaceae) are rejected and we argue for a position within
the Fagales, likely within, or close to, the Betulaceae. Pogonokarydion co-occurred in the Florissant flora with
other fagalean genera, including some still living today, like Quercus and Carya , and others now extinct like
Fagopsis and Asterocarpinus . |
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| ISSN: | 2082-0259 |