''Drewria potomacensis'' is a

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

megafossil member of the

Gnetales Gnetophyta () is a division of plants (alternatively considered the subclass Gnetidae or order Gnetales), grouped within the gymnosperms (which also includes conifers, cycads, and ginkgos), that consists of some 70 species across the three Relict ...

, from the Potomac Group, hence its name. It was possibly a shrub. It is the only known species in the genus ''Drewria''.

Description

Its stems were slender, with opposite and decussate leaves. The leaves were oblong and measured up to long. Its reproductive structures consisted of short, loose spikes arranged in dichasial groups of 3.

References

* Friis, Else Marie, Peter R. Crane, and Kaj Raunsgaard Pedersen. Early flowers and angiosperm evolution. Cambridge University Press, 2011. * *Wilson, Karen, and David Morrison, eds. Monocots: Systematics and Evolution: Systematics and Evolution. CSIRO PUBLISHING, 2000. *Pearson, David. New organic architecture: the breaking wave. University of California Press, 2001. *Hughes, Norman Francis. The enigma of angiosperm origins. Vol. 1. Cambridge University Press, 1994. *Bell, Peter R., and Alan R. Hemsley. Green plants: their origin and diversity. Cambridge University Press, 2000. Gnetophyta Prehistoric gymnosperm genera Prehistoric plants of North America Cretaceous plants {{cretaceous-plant-stub

Description

References

Further reading