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| walnut |
| wapato also called duck potato, sagittaria latifolia |
| wasabe also called eutrema wasabi, wasabia japonica |
| wasabia japonica also called wasabe, eutrema wasabi |
| water hyacinth |
| water yam also called guyana arrowroot, greater yam, name-de-agua, ten-months yam, white yam, winged yam, yam, dioscorea alata |
| watermelon also called citrullus lanatus, citrullus vulgaris, citrullus vulgaris s. |
| welsh onion also called japanese bunching onion, allium fistulosum |
| welwitschia |
| werinnua also called niger seed, niger, ramtil, ramtilla, guizotia abyssinica |
| western balsam poplar also called black cottonwood, populus balsamifera subsp. trichocarpa, populus trichocarpa |
| western hemlock |
| wheat also called bread wheat, canadian hard winter wheat, common wheat, triticum aestivum, triticum vulgare, tricum aestivum, triticum aestivam, triticum aestivum8 |
| white ash |
| white birch also called european white birch, betula pendula, betula verrucosa |
| white clover also called creeping white clover, trifolium repens |
| white fir also called grand fir, lowland fir, lowland white fir, silver fir, yellow fir, abies grandis |
| white goosefoot also called lamb's-quarters, pigweed, chenopodium album |
| white mustard also called yellow mustard, sinapis alba, brassica hirta |
| white spruce |
| white yam also called guyana arrowroot, greater yam, name-de-agua, ten-months yam, water yam, winged yam, yam, dioscorea alata |
| white-man's-foot also called common plantain, cart-track plant, plantago major |
| whitebeam |
| whitneya |
| whortleberry also called bilberry, vaccinium myrtillus |
| wild barley also called hordeum vulgare subsp. spontaneum, hordeum spontaneum |
| wild rye also called elymus, elytrigia |
| wild soybean |
| willows |
| wine grape |
| winged bean also called goa bean, asparagus bean, asparagus pea, winged beans, psophocarpus tetragonolobus, prophocarpus tetragonolobus |
| winged beans also called winged bean, goa bean, asparagus bean, asparagus pea, psophocarpus tetragonolobus, prophocarpus tetragonolobus |
| winged pea also called lotus tetragonolobus, tetragonolobus purpureus |
| winged tobacco also called persian tobacco, indian tobacco, flowering tobacco, ornamental tobacco, nicotiana alata |
| winged yam also called guyana arrowroot, greater yam, name-de-agua, ten-months yam, water yam, white yam, yam, dioscorea alata |
| winter squash also called boston marrow, cucurbita maxima |
| wisteria |
| wisteria floribunda also called japanese wisteria, japanese wistaria |
| withania |
| withania somnifera |
| witloof also called chicory, radicchio, succory, cichorium intybus, cichorium intybus var. foliosum |
| wood tobacco |
| woodbine also called virginia-creeper, parthenocissus quinquefolia |
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