Ecdeiocolea is a genus of grass-like plants from Western Australia. It was first defined by von Mueller in 1874. Ecdeiocolea contains two species.Barbara G. Briggs. 2011. "Ecdeiocolea rigens, a new species of Ecdeiocolea (Poales) from Western Australia". Telopea 13(1-2):69-75. ISSN 0312-9764. The genus is a member of the small family Ecdeiocoleaceae and its type species is the widespread Ecdeiocolea monostachya .
Ecdeiocolea is most closely related to the graminoid families Joinvilleaceae and Poaceae. Molecular phylogenetic studies indicate that Ecdeiocolea is sister to Poaceae.Thomas J. Givnish, Mercedes Ames, Joel R. McNeal, Michael R. McKain, P. Roxanne Steele, Claude W. dePamphilis, Sean W. Graham, J. Chris Pires, Dennis W. Stevenson, Wendy B. Zomlefer, Barbara G. Briggs, Melvin R. Duvall, Michael J. Moore, J. Michael Heaney, Douglas E. Soltis, Pamela S. Soltis, Kevin Thiele, and James H. Leebens-Mack. 2010. "Assembling the Tree of the Monocotyledons: Plastome Sequence Phylogeny and Evolution of Poales". Annals of the Missouri Botanical Garden 97(4):584-616.
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