Winter

Trees and Shrubs With Winter Interest
Paperbark maple (Acer griseum)
Coral bark Japanese maple (Acer palmatum ‘Sango Kaku’)
Columnar hornbeam (Carpinus betulus ‘Fastigiata’)
Glorybower tree (Clerodendrum trichotomum)
Bloodtwig dogwood (Cornus sanguinea)
Red-twig dogwood (Cornus stolonifera)
Yellow-twig dogwood (Cornus stolonifera ‘Flaviramea’)
Washington hawthorn (Crataegus phaenopyrum)
Birch bark cherry (Prunus serrula)
Contorted willow (Salix matsudana ‘Tortuosa’)
Camperdown elm (Ulmus glabra)
Corylus avellana ‘contorta’
Perennials That Bloom in Winter or Early Spring
Rockcress (Arabis sturii)
Wild ginger (Asarum caudatum)
Common aubretia (Aubretia deltoidea)
Glory of the snow (Chinodoxa luciliae)
Lily-of-the-Valley (Convallaria majalis)
Crocus (Crocus spp.)
Hardy cyclamen (Cyclamen spp.)
Winter aconite (Eranthus hyemalis)
Fawn lily (Erythronium californicum)
Euphorbia ((Euphorbia characias)
Giant snowdrop (Galanthus elwesii)
Christmas rose (Helleborus niger)
Lenten rose (Helleborus orientalis)
Common hyacinth (Hyacinthus orientalis)
Candytuft (Iberis sempervirens)
Creeping phlox (Phlox stolonifera)
Primrose (Primula x juliana)
Bethlehem sage (Pulmonaria saccharata)
Bloodroot (Sanguinaria canadensis)
Foamflower (Tiarella wherryi)
Trillium (Trillium grandiflorum)
Violet (Viola spp.)
Barren strawberry (Waldsteinia fragarioides)
Resources:
The Pacific Northwest Gardener’s Book of Lists by Ray and Jan McNeilan, 1997.