The big-leaved crown beard is a perennial subshrub in the sunflower family (Asteraceae). It was listed as threatened in 1996, and ongoing threats to the species include destruction and modification of habitat by residential development, urbanization, as well as fuel modification activities, non-native plants and 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 . These threats have been reduced for approximately half of the occurrences that occur within the reserve system of the Orange County Central/Coastal Habitat Conservation Plan at Aliso and Wood Canyons Wilderness Park and several recently established conservation easements held by the California Department of Fish and Wildlife, Orange County Transportation Authority, and the Coastal Conservancy. However, these threats are still potentially impacting the species.