The aroidsWilliam 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 aroids are a predominantly tropical group of herbaceous terrestrial or epiphytic plants. Edible plants, poisonous species, ornamentals. The superorder contains 2 families, 110 genera, and approximately 2500 species.
The aroids are distinguished by distichous leaves, paracytic stomata, carpels with multiple ovules, and albuminous seeds (Grayum, 1990). A close relationships to the alismatids is supported in most analyses.
Bogner, J and DH Nicolson 1991. A revised classification of Araceae with dichotomous keys. Willdenowia 21: 35-50.
French, JC, MG Chung, and YK Hur. 1995. Chloroplast DNA phylogeny of the Ariflorae. pp 255-275 in: PJ Rudall, PJ Cribb, DF Cutler, and CJ Humphries. Monocotyledons: systematics and evolution. Royal Botanic Gardens, Kew.
Grayum, MH. 1990. Evolution and phylogeny of the Araceae. Ann. Missouri Bot. Gard. 77: 628-697.
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Citing this page:
Hahn, William J. 1997. Aranae. The aroids. Version 01 January 1997 (under construction). http://tolweb.org/Aranae/21330/1997.01.01 in The Tree of Life Web Project, http://tolweb.org/