They appear to be designed to look like agave cactus growing out of the ground. They mix in well in one of the cactus gardens at the Desert Botanical Gardens.
Chihuly's: Nature of Glass art exhibition at the Desert Botanical Gardens ends tomorrow. I have taken many photos to place on my site during the next year.
Click Chihuly below to see more photos and don't forget to click the older posts as well under the Chihuly label.