Source: California Invasive Plant Council
URL of this page: http://www.cal-ipc.org/ip/management/plant_profiles/Cynoglossum_officinale.php
Cynoglossum officinale (houndstongue)
Cynoglossum officinale
Photo courtesy Joseph DiTomaso
Cynoglossum officinale (houndstongue) is a biennial forb (family Boraginaceae) whose foliage can be toxic to horses and other livestock when it contaminates hay. In California, it is found in the Cascade Ranges. The seeds have hooked projections that facilitate long distance dispersal by animals and humans.
Cal-IPC Inventory rating: Moderate
Cal-IPC Resources on Cynoglossum officinale
- California Invasive Plant Inventory Assessment Form (pdf) - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
- Cal-IPC News - Articles from our quarterly newsletter. (None for this species.)
- Cal-IPC Symposium Proceedings - Presentations and papers from our annual Symposium. List of articles on Cynoglossum officinale.
Cal-IPC News Articles
- None for this species.
Cal-IPC Symposium Proceedings
- DiTomaso, J. M. (2005). Efficacy and safety of new herbicides on the horizon. California Invasive Plant Council Symposium 2005. Chico, California, CA.
- Tu, M. and J. M. Randall (2002). 2002 Red alert! New introductions and recent expansions in California. California Exotic Pest Plant Council Symposium 2002. Sacramento, CA.
- Tu, M. and J. M. Randall (2003). 2003 Cal-IPC red alert! New invasions, recent expansions, and a few others to be on the look-out For. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
Other Resources on Cynoglossum officinale
- USDA PLANTS database - Federal database with information on identification and distribution, and links to websites in individual states.
- Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
- CalFlora - Distribution information by county based on submitted observations and herbarium specimens.
- The Nature Conservancy Management Summary - Information compiled by TNC land managers. Photos included for some species.
- CalPhotos - Images of plants taken mostly in California.
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