CommelinanaeWilliam J. Hahn
This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.
You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species.close box
The Commelinanae includes the grasses, sedges, bromeliads, and relatives. This superorder includes approximately 25 families, 1075 genera, and 24000 species.
The Commelinanae are characterized by scrobiculate pollen with operculate apertures and orthotropous ovules, girdle-like endothecial thickenings of the anthers, annulate pollen apertures, and apical placentation (Linder and Kellogg, 1993).
Linder, HP & EA Kellogg. 1995. Phylogenetic patterns in the commelinid clade. pp 473-496 in: PJ Rudall, PJ Cribb, DF Cutler & CJ Humphries (eds.). Monocotyledons: systematics and evolution. Royal Botanic Garden, Kew.
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Page: Tree of Life Commelinanae. Authored by William J. Hahn. The TEXT of this page is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.
Citing this page:
Hahn, William J. 1997. Commelinanae. Version 01 January 1997 (under construction). http://tolweb.org/Commelinanae/21340/1997.01.01 in The Tree of Life Web Project, http://tolweb.org/