| Impact ID | 5641 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | In some areas of the United Kingdom this Crassula helmsii is highly invasive and it out-competes many native plant species by forming dense smothering mats of vegetation |
| Reference | 29339 |
| Cost | |
| Location | |