Tim: Z. citrina has cupped flowers and much shorter petals. Z. flavissima has longer petals that are slightly wavy. Perhaps the photos in our rain lily study gallery will help. Z. citrina certainly does naturalize quite well. http://gallery.plantdelights.com/v/… Tony Avent Plant Delights Nursery @ Juniper Level Botanic Garden 9241 Sauls Road Raleigh, North Carolina 27603 USA Minimum Winter Temps 0-5 F Maximum Summer Temps 95-105F USDA Hardiness Zone 7b email email@example.com website http://www.plantdelights.com/ phone 919 772-4794 fax 919 772-4752 "I consider every plant hardy until I have killed it myself...at least three times" - Avent -----Original Message----- From: firstname.lastname@example.org [mailto:email@example.com] On Behalf Of Tim Chapman Sent: Sunday, September 09, 2012 11:30 AM To: Pacific Bulb Society Subject: Re: [pbs] Native ? Yellow Zephyranthes questions Tony, How would one distinguish between flavissima and citrina? I thought maybe Z citrina was a possibility since it is a common garden plant and apparently naturalizes. If there are other photos or measurements that would help let me know. Tim Chapman On Sep 9, 2012, at 9:40 AM, Tony Avent <Tony@plantdelights.com> wrote: > Tim: > > Your yellow zephyranthes sure looks like the South American native Z. flavissima.