| asclepias quadrifolia | | USA: Virginia, Front Royal, Smithsonian National Zoological Park's Conservation Biology Institute, Front Royal, VA | | 874509147 |
| asclepias quadrifolia | | USA: Virginia, Front Royal, Smithsonian National Zoological Park's Conservation Biology Institute, Front Royal, VA | | 844174391 |
| asclepias quadrifolia | | USA: Virginia, Front Royal, Smithsonian National Zoological Park's Conservation Biology Institute, Front Royal, VA | | 874509059 |
| asclepias quadrifolia | | USA: Virginia, Front Royal, Smithsonian National Zoological Park's Conservation Biology Institute, Front Royal, VA | | 846098854 |
| asclepias quadrifolia | | USA: Virginia, Front Royal, Smithsonian National Zoological Park's Conservation Biology Institute, Front Royal, VA | | 844174509 |