Derivation uncertain: 1. Greek ονος θηρας (onos theras), or “donkey catcher.” 2. Or οινος θηρας (oinos theras), “wine seeker.” 3. Or Latin oenothera, “a plant whose juices may cause sleep”
Species
caespitosa
Caespitose, having a densely-clumped, tufted or cushion-like growth form, with the flowers held above the clump or tuft, alternate spelling cespitose