Just discovered this on a limestone ledge on my neighbors lot. I believe this is the first time I've seen this species substantially N of the Colorado River. Just recently leafing out; won't be blooming for another month. Note dried pendant flower/seed clusters from last year. See another image of this same plant beginning to bloom in late June: http://www.inaturalist.org/observations/1726310
Compare with Scott's observation in W Travis Co.:
http://www.inaturalist.org/observations/920456