|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|W. L. Crepet and D. L. Dilcher 1977||Spicate inflorescences at least 6 cm in length of nearly sessile, alternate, perfect flowers; flowers having a small floral envelope (1.95 mm x 1.76 mm) composed of a shallowly-dished calyx and a corolla with four ovate lobes connate at the base; 10 exserted stamens extending 5 mm beyond the floral envelope with bilocular longitudinally-dehiscing anthers; style extending 2 mm beyond the floral envelope with bilocular longitudinally-dehiscing anthers; style extending 2 mm beyond the floral envelope ending in a slightly swollen rounded stigma; both style and stigma with hairs; pollen grains tricolporate and arranged in permanent tetrahedral tetrads 32 micrometers in diameter; exine tectate, reticulate, and baculate (sensu Sorsa, 1969); exine continuous between grains in region of apertures and exine|