Robuta

https://www.huntington.org/collections/bot-138968 Amsonia tabernaemontana | Collections | The Huntington amsonia tabernaemontana collections huntington https://www.rhs.org.uk/plants/46168/amsonia-tabernaemontana-var-salicifolia/details Amsonia tabernaemontana var. salicifolia | eastern bluestar Herbaceous Perennial/RHS amsonia tabernaemontana eastern bluestar herbaceous perennial var salicifolia