National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
Reference for:
Periploca graeca
Source:
The PLANTS Database
Acquired:
2000-01-21
Notes:
National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
Reference for:
Periploca graeca
Source:
Germplasm Resources Information Network (GRIN) Taxonomy Database
Acquired:
2003-01-21
Notes:
National Plant Germplasm System (NPGS), National Germplasm Resources Laboratory, Agricultural Research Service, USDA. http://www.ars-grin.gov/npgs/tax/index.html
Reference for:
Periploca graeca
Source:
Apocynaceae of North America Update
Acquired:
2011-11-30
Notes:
Updated for ITIS by the Flora of North America Expertise Network, in connection with an update for USDA PLANTS (2007-2010)