Common names: large-leaved hypericum
Hypericum grandifolium (large-leaved Hypericum) is a shrub (family Clusiaceae) with yellow flowers and oval-shaped leaves found in the San Francisco Bay area in California. It is native to Madeira and the Canary Islands. It grows in woodlands. It spreads via rhizomes and seeds. Its seeds are buoyant and can be carried by water.
Cal-IPC Rating: Watch
Plant Risk Assessment
Plant Risk Assessment- An evaluation of the potential for a plant to be invasive in California.
Weed Management NotesNo Weed RIC Management Notes are available for this species. Check for information on other species in the genus on the Weed RIC site.
Cal-IPC Newsletter Articles
- Weed biological control agents approved for California. Pitcairn, Michael J.; Smith, Lincoln; Moran, Patrick. Vol 22, Issue 1
Cal-IPC Symposium Presentations
Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.
- New and expanding weeds in California. Kelch, Dean (2011)
Other Hypericum grandifolium Information
- CalPhotos - Images of plants taken mostly in California.
- Calflora - See the distribution of this species on Calflora's map of California.
- USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.
- EDDMapS - North American distribution based on Early Detection and Distribution Mapping System.