Kew World Checklist of Selected Plant Families, botanical information system at the Royal Botanic Gardens, Kew, available at http://apps.kew.org/wcsp/home.do
Reference for:
Stachytarpheta X trimenii
Source:
The International Plant Names Index (IPNI), 2007 - 2011
Acquired:
2011-01-01
Notes:
The International Plant Names Index, botanical information system from the Royal Botanic Gardens, Kew, the Harvard University Herbaria, and the Australian National Herbarium, available at http://www.ipni.org/index.html