In heavy 4-quart saucepan or Dutch oven, heat butter. Add wild rice and celery. Saute until lightly browned. Add water, broth, bay leaf, salt, oregano, and pepper to saucepan. Heat to boiling; cover and cook over low heat 25 minutes.
Stir white rice into wild rice; cook, covered, until rice is tender - about 20 minutes longer. Fold in apple and green onions.
Set stuffing aside just until cool enough to stuff neck and body cavities of turkey. Or spoon into greased 2 1/2-quart casserole; cover and bake at 325'F about 20 minutes or until apples are tender.