NAS - Nonindigenous Aquatic Species
Minchin, D. 2008. Species factsheet: Crassula helmsii. Delivering Alien Invasive Species inventories for Europe (DAISIE). http://www.europe-aliens.org/speciesFactsheet.do?speciesId=8738. Accessed on 01/19/2017.
Reference Number: 29352 Type: Database Author: Minchin, D. Date (year): 2008 Title:Species factsheet: Crassula helmsii Publisher:Delivering Alien Invasive Species inventories for Europe (DAISIE) Publisher Location: URL: http://www.europe-aliens.org/speciesFactsheet.do?speciesId=8738 Accessed on: 01/19/2017 Created on: Keywords: Crassula helmsii, New Zealand pygmyweed, swamp stonecrop
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Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/13/2026].
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