Plant Fossil Names Registry Number: PFN002766
Act LSID: urn:lsid:plantfossilnames.org:act:2766
Author: S. R. Manchester
Reference: Manchester, S. R. (1986): Vegetative and Reproductive Morphology of an Extinct Plane Tree (Platanaceae) from the Eocene of Western North America. – Botanical Gazette 147(2): 200–226., link
Page of description: 212
Platananthus synandrus Manchester
Globose staminate heads 3–10 mm in diameter composed of a spheroidal receptacular core surrounded by numerous staminate florets. Each floret has five elongate anthers on short filaments with conical, elongate-peltate connectives surrounded by prominent tepals. Pollen reticulate, tricolpate, and small, 11–16 μm polar length, 8–14 μm equatorial diameter.
Friis et al. (1988: Reproductive Structures of Cretaceous Platanaceae. – Biol. Skr., 31: 10):
Globose staminate inflorescences composed of a spheroidal receptacular core surrounded by numerous closely packed staminate flowers. Each flower consists of five stamens surrounded by prominent tepals. Stamens have elongate anthers on short filaments with peltate to conical extensions of the connectives. Pollen spheroidal to prolate, small to very small, tricolpate reticulate.
Plant fossil remain
macro- and meso-fossils-embryophytes except wood