Dudleya chasmophyta, commonly known as the Santiago Canyon liveforever or the crevice live-forever, is a rare succulent endemic to Orange County, California. It is known from a single population occupying a steep cliff band. When first classified this population was originally lumped with Dudleya cymosa ssp. ovatifolia, but genomic testing led to Dudleya chasmophyta's confirmation as a separate species in 2024. It has yellow flowers and blooms late spring - early summer.
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