maiden's honesty

honesty, in the obsolete sense of "chastity".

maiden's honesty (uncountable)

1. A plant of the species Clematis vitalba, evergreen clematis, a vine, native to the chalk and limestone soils of Britain, often considered invasive and noxious elsewhere.

• (Clematis vitalba): old man's beard, traveller's joy

• Clematis vitalba on Wikipedia.Wikipedia
• Clematis vitalba on Wikispecies.Wikispecies
• Clematis vitalba on Wikimedia Commons.Wikimedia Commons
• Clematis vitalba at USDA Plants database