Aaron's-beardHerb.|ˈɛərənzˈbɪəd|[Ref.to Psalm cxxxiii. 2.]A name popularly applied to several plants; especially the GreatSt.John's wort (Hypericum calycinum), from its prominent tufts of hair-like stamens; a cultivated species of Saxifrage (S. sarmentosa) from S. Africa, and the Ivy-leaved Toadflax (Linaria Cymbalaria), from the long dependent runners which they throw over the edge of a flowerpot; also, a shrub (Spiraea salicifolia), from its dense racemes of hairy-looking flowers; and locally to other plants. Prior Dict.Eng.Plant Names,s.v.1549Complaynt ofScotl.vi. 67 (1872)I sau ane erb callit barba aaron, quhilk vas gude remeid for emoroyades of the fundament.1878R. ThompsonGardener's Assist. 656/2H[ypericum]calycinum, rose of Sharon or Aaron's beard.