Chinese shrub or small tree having white or pink flowers becoming deep red at night
common carline thistle
Noun
Eurasian thistle growing in sand dunes and dry chalky soils
coneflower
Noun
any of various perennials of the eastern United States having thick rough leaves and long-stalked showy flowers with drooping rays and a conelike center
coneflower
Noun
a wildflower of the genus Ratibida
coneflower
Noun
any of various plants of the genus Rudbeckia cultivated for their large usually yellow daisies with prominent central cones
catananche
Noun
any of several plants of the genus Catananche having long-stalked heads of blue or yellow flowers
cupid's dart
Noun
south European plant having dark-eyed flowers with flat blue rays
centaury
Noun
any plant of the genus Centaurea
centaury
Noun
any of various plants of the genus Centaurium
cornflower
Noun
an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers
cornflower
Noun
plant of southern and southeastern United States grown for its yellow flowers that can be dried
chafeweed
Noun
weedy perennial of north temperate regions having woolly foliage and dirty white flowers in a leafy spike
caltrop
Noun
a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
caltrop
Noun
tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets
coreopsis
Noun
any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods
curlycup gumweed
Noun
perennial gumweed of western and central North America
cankerweed
Noun
herb of northeastern North America having drooping clusters of yellowish-white flowers
cotton thistle
Noun
biennial Eurasian white hairy thistle having pale purple flowers
cat's-ear
Noun
European weed widely naturalized in North America having yellow flower heads and leaves resembling a cat's ears
cat's-ear
Noun
any of several plants of the genus Calochortus having flowers with petals shaped like cat's ears
camphor daisy
Noun
annual of southern United States and Mexico having bristly leaves and pale yellow flowers
capeweed
Noun
European weed widely naturalized in North America having yellow flower heads and leaves resembling a cat's ears
cascade everlasting
Noun
shrub with white woolly branches and woolly leaves having fragrant flowers forming long sprays
common lettuce
Noun
annual or perennial garden plant having succulent leaves used in salads
common sunflower
Noun
annual sunflower grown for silage and for its seeds which are a source of oil
common madia
Noun
California annual having red-brown spots near the base of its yellow flower rays
common tarweed
Noun
California annual having red-brown spots near the base of its yellow flower rays
climbing hempweed
Noun
herb of tropical America having vanilla-scented flowers
climbing boneset
Noun
herb of tropical America having vanilla-scented flowers
climbing hemp-vine
Noun
herb of tropical America having vanilla-scented flowers
coltsfoot
Noun
perennial herb with large rounded leaves resembling a colt's foot and yellow flowers appearing before the leaves do
coltsfoot
Noun
tufted evergreen perennial herb having spikes of tiny white flowers and glossy green round to heart-shaped leaves that become coppery to maroon or purplish in fall
camphor dune tansy
Noun
densely hairy plant with rayless flowers
crownbeard
Noun
any plant of the genus Verbesina having clustered white or yellow flower heads
crown-beard
Noun
any plant of the genus Verbesina having clustered white or yellow flower heads
crown beard
Noun
any plant of the genus Verbesina having clustered white or yellow flower heads
cutleaved coneflower
Noun
tall leafy plant with erect branches ending in large yellow flower heads with downward-arching rays
common dandelion
Noun
Eurasian plant widely naturalized as a weed in North America
creeping zinnia
Noun
low-branching leafy annual with flower heads resembling zinnias
costusroot
Noun
annual herb of the eastern Himalayas (Kashmir) having purple florets and a fragrant root that yields a volatile oil used in perfumery and for preserving furs
cineraria
Noun
herb of Canary Islands widely cultivated for its blue or purple or red or variegated daisylike flowers
cornflower aster
Noun
erect perennial of southeastern United States having large heads of usually blue flowers
caladenia
Noun
any of various orchids of the genus Caladenia
creeping bellflower
Noun
erect European herb with creeping rootstocks and nodding spikelike racemes of blue to violet flowers
calanthe
Noun
any of various showy orchids of the genus Calanthe having white or yellow or rose-colored flowers and broad leaves folded lengthwise
cup and saucer
Noun
European biennial widely cultivated for its blue or violet or white flowers
clustered lady's slipper
Noun
clusters of several short stems each having 2 broad leaves and 2-4 drooping brownish to greenish flowers with pouches mottled with purple
calypso
Noun
rare north temperate bog orchid bearing a solitary white to pink flower marked with purple at the tip of an erect reddish stalk above 1 basal leaf
clustered bellflower
Noun
bellflower of Europe to temperate Asia having dense spikes of violet-blue to white flowers
common spotted orchid
Noun
European orchid having lanceolate leaves spotted purple and pink to white or mauve flowers spotted or lined deep red or purple