Some days I find it thrilling to follow botanical ideas and distinctions; other days I'd rather weed. For a quick hit of currently accepted names, I usually rely on The Plant List maintained by Kew http://www.theplantlist.org/ (the list's keepers do admit it's imperfect). For greater depth, I often wander over to the Angiosperm Phylogeny site maintained on the servers of the Missouri Botanical Garden http://www.mobot.org/MOBOT/research/APweb/ . This is the "APG III" to which Nhu refers. Here one can find all kinds of data: plant names and former names, cladograms of relationships, detalis of the the traits that distinguish one taxon from another and, crucially, references to the publications on which the new last word is based. If you go to the APG III Home page and click on TREES at the top, you'll get a cladogram of all the Orders in angiosperms; you can click on each Order to see relationships at lower levels. In the first tree, Asparagales contains the family Amaryllidaceae, which contains the genus Allium. Liliales is right above Asparagales. It's easy to compare traits (and to imagine why Aaron might expect more papers to come). Paige Woodward British Columbia, Canada wet Zone 6