European thistle with rather large heads and prickly leaves
blue succory
Noun
south European plant having dark-eyed flowers with flat blue rays
boar thistle
Noun
European thistle with rather large heads and prickly leaves
blessed thistle
Noun
annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers
blessed thistle
Noun
tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads
basket flower
Noun
annual of southwestern United States cultivated for its purple flower heads and its bracts that resemble small baskets
brittlebush
Noun
fragrant rounded shrub of southwestern United States and adjacent Mexico having brittle stems and small crowded blue-green leaves and yellow flowers
brittle bush
Noun
fragrant rounded shrub of southwestern United States and adjacent Mexico having brittle stems and small crowded blue-green leaves and yellow flowers
black knapweed
Noun
a weedy perennial with tough wiry stems and purple flowers
broom snakeweed
Noun
low-growing sticky subshrub of southwestern United States having narrow linear leaves on many slender branches and hundreds of tiny yellow flower heads
broom snakeroot
Noun
low-growing sticky subshrub of southwestern United States having narrow linear leaves on many slender branches and hundreds of tiny yellow flower heads
broomweed
Noun
annual of southwestern United States having rigid woody branches with sticky foliage and yellow flowers
broom-weed
Noun
annual of southwestern United States having rigid woody branches with sticky foliage and yellow flowers
blazing star
Noun
any of various North American plants of the genus Liatris having racemes or panicles of small discoid flower heads
blazing star
Noun
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
button snakeroot
Noun
any of various North American plants of the genus Liatris having racemes or panicles of small discoid flower heads
button snakeroot
Noun
coarse prickly perennial eryngo with aromatic roots
button snakeroot
Noun
coarse prickly perennial eryngo of United States thought to cure rattlesnake bite
butterweed
Noun
any of several yellow-flowered plants of the genus Packera
butterweed
Noun
American ragwort with yellow flowers
burweed marsh elder
Noun
tall annual marsh elder common in moist rich soil in central North America that can cause contact dermatitis
bastard feverfew
Noun
tropical American annual weed with small radiate heads of white flowers
blackfoot daisy
Noun
bushy subshrub having flower heads that resemble asters with broad white rays
big marigold
Noun
a stout branching annual with large yellow to orange flower heads
bible leaf
Noun
tansy-scented Eurasian perennial herb with buttonlike yellow flowers
balsam herb
Noun
tansy-scented Eurasian perennial herb with buttonlike yellow flowers
big sagebrush
Noun
aromatic shrub of arid regions of western North America having hoary leaves
blue sage
Noun
aromatic shrub of arid regions of western North America having hoary leaves
blue sage
Noun
blue-flowered sage of dry prairies of the eastern United States
blue sage
Noun
Texas sage having intensely blue flowers
blue sage
Noun
sage of western North America to Central America having violet-blue flowers
black-eyed Susan
Noun
the state flower of Maryland
black-eyed Susan
Noun
annual weedy herb with ephemeral yellow purple-eyed flowers
black-eyed Susan
Noun
tropical African climbing plant having yellow flowers with a dark purple center
blowball
Noun
any of several herbs of the genus Taraxacum having long tap roots and deeply notched leaves and bright yellow flowers followed by fluffy seed balls
beach goldenrod
Noun
vigorous showy goldenrod common along eastern coast and Gulf Coast of North America
butterbur
Noun
small Eurasian herb having broad leaves and lilac-pink rayless flowers
bog rhubarb
Noun
small Eurasian herb having broad leaves and lilac-pink rayless flowers
broad leaved goldenrod
Noun
a variety of goldenrod
bristly oxtongue
Noun
widespread European weed with spiny tongue-shaped leaves and yellow flowers
benweed
Noun
widespread European weed having yellow daisylike flowers
bugloss
Noun
widespread European weed with spiny tongue-shaped leaves and yellow flowers
bugloss
Noun
perennial or biennial herb cultivated for its delicate usually blue flowers
bluebell
Noun
perennial of northern hemisphere with slender stems and bell-shaped blue flowers
bluebell
Noun
one of the most handsome prairie wildflowers having large erect bell-shaped bluish flowers
bluebell
Noun
sometimes placed in genus Scilla
butter daisy
Noun
coarse greyish-green annual yellow-flowered herb
butterfly orchid
Noun
Mediterranean orchid having usually purple flowers with a fan-shaped spotted or striped rose-red lip
butterfly orchid
Noun
orchid of Florida and the Bahamas having showy brightly colored flowers
butterfly orchid
Noun
Mexican epiphytic orchid having pale green or yellow-green flowers with white purple-veined lip