white buds and flowers of trifoliate orange, citrus trifoliata or poncirus trifoliata. beautiful thorny tree on a sunny spring day

white trifoliate orange poncirus branch trifoliata flower bud botany spring plant nature green garden leaf japanese bitterorange hardy close chinese bitter outdoors thorn citrus spine thorns shoot springtime smell shrub season flora petal new natural lemon tree fresh floral european agriculture background beautiful beauty environment bloom blossom closeup blooming buds flowers thorny sunny day trifoliata