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woolly-stemmed biennial arborescent shrub of tropical Africa and southern Asia having silvery-white prickly branches, clusters of blue or white flowers, and bright red berries resembling holly berries African holly , Solanum giganteum
perennial or biennial herb cultivated for its delicate usually blue flowers alkanet , Anchusa officinalis , bugloss
large genus of perennial and biennial pungent bulbous plants: garlic; leek; onion; chive; sometimes placed in family Alliaceae as the type genus Allium , genus Allium
biennial cultivated herb; its stems are candied and eaten and its roots are used medicinally Angelica Archangelica , archangel , garden angelica
coarse erect biennial Old World herb introduced as a weed in eastern North America Anthriscus sylvestris , cow parsley , wild chervil
genus of rhizomatous perennial or biennial herbs with numerous sometimes fragrant flowers in long cylindrical racemes; Mediterranean region to Caucasus; sometimes placed in family Asphodelaceae Asphodeline , genus Asphodeline
biennial or perennial herbs of north temperate regions: winter cress Barbarea , genus Barbarea
biennial Eurasian plant usually having a swollen edible root; widely cultivated as a food crop beet , Beta vulgaris , common beet
biennial of southwestern United States having white stems and toothed leaves that is grown for its large pale yellow flowers that open in early morning blazing star , Mentzelia laevicaulis , Mentzelia livicaulis
tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America blessed thistle , holy thistle , lady's thistle , milk thistle , Our Lady's mild thistle , Silybum marianum
any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs burdock , clotbur
large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonous California fern , Conium maculatum , hemlock , Nebraska fern , poison hemlock , poison parsley , winter fern
Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America caltrop , Centauria calcitrapa , star-thistle
annual and biennial herbs of Mediterranean to central Asia Camelina , genus Camelina
European biennial widely cultivated for its blue or violet or white flowers Campanula medium , Canterbury bell , cup and saucer
European biennial introduced in North America having flower heads in crowded clusters at ends of branches Carduus crispus , welted thistle
showy erect biennial or short-lived perennial cultivated for its terminal racemes of orange-yellow flowers; sometimes placed in genus Cheiranthus Cheiranthus allionii , Erysimum allionii , Siberian wall flower
biennial or short-lived perennial prairie rocket having orange-yellow flowers; western North America to Minnesota and Kansas; sometimes placed in genus Cheiranthus Cheiranthus asperus , Erysimum arkansanum , Erysimum asperum , western wall flower
biennial east Asian herb grown for its usually bright blue flowers Chinese forget-me-not , Cynoglossum amabile
coarse biennial of eastern North America with yellow flowers that open in the evening; naturalized in Europe common evening primrose , German rampion , Oenothera biennis
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