San Diego button celery is a small, low-spreading, green flowered bi-annual herb in the parsley/carrot family. It was listed as endangered in 1993, and ongoing threats to the species include urbanization, climate change climate change
Climate change includes both global warming driven by human-induced emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. Though there have been previous periods of climatic change, since the mid-20th century humans have had an unprecedented impact on Earth's climate system and caused change on a global scale.

Learn more about climate change and fire. Conservation under the City of San Diego Vernal Pool Habitat Conservation Plan, as well as management efforts under the Marine Corps Air Station Miramar and Marine Corps Base Camp Pendleton Integrated Natural Resource Management Plans have reduced or ameliorated many of the original threats impacting the species at time of listing, such as habitat loss.