Plants: W
- Wafer Ash Ptelea trifoliata Flowering shrub
- Walking Iris Neomarica gracilis Garden perennial
- Walking Onion Allium x proliferum Allium
- Wall Germander Teucrium chamaedrys Creeping perennial
- Wall Rock Cress Arabis caucasica Creeping perennial
- Wallflower Erysimum cheiri Garden perennial
- Walnut Juglans regia Nut
- Walnut Juglans nigra Nut
- Walter's Violet Viola walteri Creeping perennial
- Warminster Broom Cytisus × praecox Flowering shrub
- Wasabi Eutrema japonicum Root
- Washington Hawthorn Crataegus phaenopyrum Flowering tree
- Water Hawthorn Aponogeton distachyos Garden perennial
- Water Hyssop Bacopa monnieri Creeping perennial
- Water Poppy Hydrocleys nymphoides
- Water Tupelo Nyssa aquatica
- Watercress Nasturtium officinale Leafy
- Waterlily Tulip Tulipa kaufmanniana Bulb
- Watermelon Citrullus lanatus Fruiting
- Wavy Hairgrass Deschampsia flexuosa Grass
- Wax Begonia Begonia cucullata Garden perennial
- Wax Currant Ribes cereum Berry
- Weeping Bottlebrush Callistemon viminalis Flowering shrub
- Weeping Forsythia Forsythia suspensa Flowering shrub
- Weigela Weigela florida Flowering shrub
- Western Aster Symphyotrichum ascendens Wildflower
- Western Azalea Rhododendron occidentale Flowering shrub
- Western Buttercup Ranunculus occidentalis Wildflower
- Western Columbine Aquilegia formosa Wildflower
- Western Foamflower Tiarella trifoliata Creeping perennial
- Western Goldentop Euthamia occidentalis Wildflower
- Western Maidenhair Fern Adiantum aleuticum Fern
- Western Sunflower Helianthus occidentalis Wildflower
- Western Sweetshrub Calycanthus occidentalis Flowering shrub
- Western Wallflower Erysimum capitatum
- Western White Clematis Clematis ligusticifolia Vine
- Western Wild Ginger Asarum caudatum Creeping perennial
- Wheat Triticum aestivum Grain
- Wheat Celosia Celosia spicata Garden annual
- White Angel's Trumpet Brugmansia suaveolens Flowering shrub
- White Brodiaea Triteleia hyacinthina Wildflower
- White Clover Trifolium repens Creeping perennial
- White Forsythia Abeliophyllum distichum Flowering shrub
- White Frangipani Plumeria obtusa Flowering tree
- White Ginger Lily Hedychium coronarium Garden perennial
- White Laceflower Orlaya grandiflora Garden annual
- White Meadowsweet Spiraea alba Flowering shrub
- White Mustard Sinapis alba Brassica
- White Oak Quercus alba Nut
- White Panicle Aster Symphyotrichum lanceolatum Wildflower
- White Peach Prunus persica Tree fruit
- White Prairie Clover Dalea candida Wildflower
- White Prickly Poppy Argemone albiflora Wildflower
- White Rain Lily Zephyranthes candida Bulb
- White Rose of York Rosa × alba Flowering shrub
- White Sage Salvia apiana Flowering shrub
- White Snakeroot Ageratina altissima
- White Stonecrop Sedum album Creeping perennial
- White Trout Lily Erythronium albidum Wildflower
- White Turtlehead Chelone glabra Wildflower
- White Wand Beardtongue Penstemon tubaeflorus
- White Wild Indigo Baptisia alba Wildflower
- White Wood Aster Eurybia divaricata Wildflower
- White-Veined Pipevine Aristolochia fimbriata
- Whiteleaf Manzanita Arctostaphylos viscida Flowering shrub
- Whitethorn Ceanothus Ceanothus cordulatus Flowering shrub
- Whorled Milkweed Asclepias verticillata Wildflower
- Widow's Cross Sedum pulchellum Creeping perennial
- Wild Bergamot Monarda fistulosa Herb
- Wild Garlic Allium canadense Allium
- Wild Geranium Geranium maculatum Wildflower
- Wild Ginger Asarum canadense Creeping perennial
- Wild Hyacinth Camassia scilloides Bulb
- Wild Petunia Ruellia humilis Wildflower
- Wild Quinine Parthenium integrifolium Wildflower
- Wild Senna Senna hebecarpa Wildflower
- Wild Stonecrop Sedum ternatum Creeping perennial
- Williams Camellia Camellia × williamsii Flowering shrub
- Willow Gentian Gentiana asclepiadea Wildflower
- Willow Oak Quercus phellos
- Willowleaf Aster Symphyotrichum praealtum
- Willowleaf Cotoneaster Cotoneaster salicifolius Creeping perennial
- Willowleaf Sunflower Helianthus salicifolius Wildflower
- Wineberry Rubus phoenicolasius Berry
- Winecup Callirhoe involucrata Creeping perennial
- Winged Everlasting Ammobium alatum Wildflower
- Winged Sumac Rhus copallinum Flowering shrub
- Wingstem Verbesina alternifolia Wildflower
- Winter Aconite Eranthis hyemalis Garden perennial
- Winter Heath Erica carnea Low shrub
- Winter Honeysuckle Lonicera fragrantissima Flowering shrub
- Winter Jasmine Jasminum nudiflorum Flowering shrub
- Winter Savory Satureja montana Herb
- Winterberry Ilex verticillata Flowering shrub
- Wintergreen Gaultheria procumbens Berry
- Wintermelon Benincasa hispida Fruiting
- Wintersweet Chimonanthus praecox Flowering shrub
- Wishbone Flower Torenia fournieri Garden annual
- Wood Anemone Anemone nemorosa Creeping perennial
- Wood Cranesbill Geranium sylvaticum Garden perennial
- Wood Lily Lilium philadelphicum Wildflower
- Woodbine Honeysuckle Lonicera periclymenum Vine
- Woodland Phlox Phlox divaricata Creeping perennial
- Woodland Sage Salvia nemorosa Garden perennial
- Woodland Spider Lily Hymenocallis occidentalis Bulb
- Woodland Sunflower Helianthus divaricatus Wildflower
- Woodland Tobacco Nicotiana sylvestris Wildflower
- Woodland Tulip Tulipa sylvestris Wildflower
- Woods' Rose Rosa woodsii Flowering shrub
- Woolly Blue Curls Trichostema lanatum Flowering shrub
- Woolly Butterfly Bush Buddleja marrubiifolia Flowering shrub
- Woolly Milkweed Asclepias vestita
- Woolly Pipevine Aristolochia tomentosa
- Woolly Speedwell Veronica pectinata Creeping perennial
- Woolly Stemodia Stemodia lanata Creeping perennial
- Woolly Sunflower Eriophyllum lanatum Wildflower
- Woolly Thyme Thymus pseudolanuginosus Creeping perennial
- Woolly Yarrow Achillea tomentosa Creeping perennial
- Woollypod Milkweed Asclepias eriocarpa Wildflower
- Wright's Buckwheat Eriogonum wrightii Wildflower