Can be 'Zephyranthes longifolia' ???
From http://swbiodiversity.org/seinet/taxa/index.php?taxon=271
(http://swbiodiversity.org/images/vasc_herbarium_images/Liliaceae/photos/Lily_Zephyranthes_longifolia(1).JPG)
(http://swbiodiversity.org/images/vasc_herbarium_images/Liliaceae/photos/Lily_Zephyranthes_longifolia.JPG)
Hy, It's very similar. I don't know the distribution of Z. Longifolia.
In another forum it's been identified as Z. Filifolia.
Yes, At fist time, I think she is Zephyranthes filifolia too.
But after follow flow chart from http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=135293
They say, she name Zephyranthes longifolia
(http://www.bgbulbs.com/cpt/albums/userpics/10001/normal_zephfilifolia.jpg) (http://www.bgbulbs.com/cpt/albums/userpics/10001/normal_Zephyranthes%20filifolia.jpg)
Photo of Zephyranthes filifolia from http://www.bgbulbs.com/cpt/thumbnails.php?album=2
And distribution of Zephyranthes longifolia from http://www.bonap.org/BONAPmaps2010/Zephyranthes.html
(http://www.bonap.org/BONAPmaps2010/map%20sized/Zephyranthes%20longifolia.png)