Chondrilla, Gum Succory, Hogbite, Rush Skeletonweed
The photo above shows the flower head of chondrilla as seen at Horsethief Butte.......October 7, 2006. This invasive weed can now be found at numerous places along Washington Highway SR14 from around Horsethief Butte eastward towards Wishram, WA.
A close-up of the flower head of rush skeletonweed as seen along Eightmile Creek at Columbia Hills State Park..........October 26, 2014.
The photo above shows a sideview of a flower head of chondrilla as seen at Horsethief Butte........October 7, 2006. This weedy species spreads both by windblown seeds as well as underground.
Mature seedheads of chondrilla as seen on open slopes above the Crawford Oaks Trailhead at Columbia Hills Historical State Park......November 11, 2019.