17.1. Automatically typified names of orders or suborders are to end in -ales (but not -virales) and -ineae, respectively.
17.2. Names intended as names of orders, but published with their rank denoted by a term such as "cohors", "nixus", "alliance", or "Reihe" instead of "order", are treated as having been published as names of orders.
17A.1. Authors should not publish new names for orders that include a family from the name of which an existing ordinal name is derived.
(c) 2006, by International Association for Plant Taxonomy. This page last updated 12.03.2007 .