No Fires - Fire Danger Very High - No Fuego
No Fires in the campground, no smoking on the trails. Observe these rules to protect park resources. No se permite fumar en los senderos, tampoco se permite las fogatas en el campamento. Proteja los recursos del parque y respete las advertencias.
At Pinnacles National Monument, out of approximately 625 plant species, about 100 are nonnative. Several of these species are invasive, with the potential for creating serious ecological damage and detracting from the uniqueness of the monument’s native plant community. Pinnacles National Monument Weed Control Program is focused primarily on horehound (Marrubium vulgare), mustard (Hirschfeldia incana), and yellow star thistle (Centaurea solstitialis). Weed control efforts focus on these three species because of their potential for native habitat destruction. Yellow star thistle and mustard are controlled by working through a sequence of large areas on a monthly basis. Horehound is much closer to being eradicated within the monument and is controlled by monthly visits to 140 small plots. Eradication methods include hand pulling and herbicide application.
Yellow star thistle (Centaurea solstitialis)
Yellow star thistle produces a deep taproot, which extends below the zone of root competition of associated annual species. This allows yellow star thistle to grow well into the summer after most other annuals have dried up. Each seed head produces stiff spines, 1-3 cm long that make the plant unpalatable to wildlife and painful for park visitors. Yellow star thistle is less abundant and somewhat less widely distributed within the monument than mustard. Nonetheless, it imposes a serious long-term threat because of its ability to produce large numbers of seeds and its growth during the hot summer months.
In January 1999, an integrated pest management (IPM) action plan was drafted for managing yellow star thistle at Pinnacles. The control objective of the IPM action plan was to reduce the abundance of yellow star thistle to 5% of its abundance at that time by the year 2002.
Horehound (Marrubium vulgare)
Summer Mustard (Hirschfeldia incana)
Did You Know?
California condors have a wingspan approaching nine and a half feet. Condors soar and glide at up to 55 miles per hour, and can sometimes be mistaken for a small airplane. More...