Out on one of the trails we saw this member of the iris family, Herbertia lahue. It grows in prairies meadows and grasslands so not likely to be found in my rocky neighborhood.
Rather than traveling out of Austin to view wildflowers we stayed closer to home. Hiking the Barton Creek Trail, upstream from Zilker Park we counted 31 different wildflowers. That didn't include woody perennials. Among them were some never previously seen. This is a bull nettle,
Cnidoscolus texanus. Although the flowers had an exotic appearance, one look at the leaves confirmed it as a member of the nettle family. Contact with the fine hairs can result in a severe skin reaction.
Sand bur or Crameria, Krameria lanceolata, grows low to the ground. The name sand bur comes from the seed pods which are covered with barbless spines. Now those are the kinds of burs I wouldn't mind bringing home on my socks!
I have yet to identify these two flowers. The first growing low to the ground and the second a vine. I may have to send them off to Mr Smarty plants at the Wildflower Center.
We enjoyed three wonderful days of walking, wildflowers and picnics. Now it's back to the garden.
late press- the first is Bladder-pod sida, Rhyncosida physocalyx. Thanks anon.