arrowhead: References & Edit History
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Added information on invasive species and the physical description of the genus. | Jun 27, 2014 | ||
| Deleted Web site: Plants for a Future. | Sep 04, 2013 | ||
| Added new Web site: Environmental Education For Kids - Arrowhead. | Jun 30, 2008 | ||
| Article added to new online database. | Jul 23, 1999 |
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