In large skillet brown chicken in butter and set aside. In same skillet, cook mushrooms over high heat til liquid evaporates, about 1 to 2 minutes. Remove from heat.
Sprinkle mushrooms with flour and stir quickly to mix. Gradually stir in water. Add orange juice and dry seasoning mix. Heat to boiling, stirring constantly. Reduce heat add chicken and simmer about 3 minutes.
Add orange sections and sprinkle with green onions. Serve over a bed of rice.