Found growing at Arches National Park in Moab at the end of April.
Below, the flowers in "bud" stage.
Below, flowers, quickly becoming "spent".
The stalk or stem:
The whole plant.
So, what is it??
Rumex hymenosepalus, commonly known as Canaigre or wild rhubarb, found growing at Arches National Park in Moab.
* The stem gave it away to me. LOL