Jan 21, 2011 / News / Pat Chinn-Sloan Twitter Facebook Pinterest Email January Color Appears at the Washington Park Arboretum Cedrus libani ssp. Atlantica (Atlas cedar) Chimonanthus praecox (Wintersweet) Eucalyptus pauciflora (Cabbage gum) Lonicera standishii Poncirus trifoliata (Hardy orange) Complete details.