Editing Asparagales (section)

=====Ixioliriaceae to Xeronemataceae=====
The relationship shown between [[Ixioliriaceae]] and [[Tecophilaeaceae]] is still unclear. Some studies have supported a clade of these two families,{{sfn|ps=none|Chase|Fay|Devey|Maurin|2006}} others have not.{{sfn|ps=none|Janssen|Bremer|2004}} The position of [[Doryanthaceae]] has also varied, with support for the position shown above,{{sfn|ps=none|Graham|Zgurski|McPherson|Cherniawsky|2006}} but also support for other positions.{{sfn|ps=none|Chase|Fay|Devey|Maurin|2006}}

The clade from [[Iridaceae]] upwards appears to have stronger support. All have some genetic characteristics in common, having lost Arabidopsis-type [[telomere]]s.{{sfn|ps=none|Fay et al|2000}} Iridaceae is distinctive among the Asparagales in the unique structure of the [[inflorescence]] (a rhipidium), the combination of an inferior ovary and three stamens, and the common occurrence of unifacial leaves whereas bifacial leaves are the norm in other Asparagales.

Members of the clade from [[Iridaceae]] upwards have infra-locular septal nectaries, which Rudall interpreted as a driver towards secondarily superior ovaries.{{sfn|ps=none|Rudall|2002b}}