This work was carried out between mid June 2005 and mid March 2006 and extends the work done in the pilot phase. The objectives of this extension grant were: to complete checklists begun in the first phase of iPlants (Bignoniaceae, Lecythidaceae and Iridaceae); explore and document the high level requirement for providing and maintaining checklist data; and to explore and document the impact on GenBank and Consortium for the Barcode of Life end users of implementing an authoritative checklist of known plant species. A report of this work can be seen here.