3,306 articles
Cornus florida
Cornus florida, flowering dogwood, is a small eastern North American understory tree with white or pink bracts, scarlet fruit, and hard shock-resistant wood, now threatened by dogwood anthracnose and bred for resistant cultivars.
Cornus mas
Cornus mas, cornelian cherry (kızılcık, zoghal akhteh), a dogwood shrub native to Europe and the Caucasus with edible red acidic fruits rich in vitamin C, anthocyanins, and iridoids, studied for cardiometabolic effects.
Cornus sanguinea
Cornus sanguinea (common dogwood, bloodtwig dogwood) is a deciduous European shrub of Cornaceae with red winter stems, white May-June flowers, purplish-black fruits, seeds 30% fat used for soap and lamp oil, and cultivars like 'Midwinter Fire'.
Coronilla
Coronilla (crownvetch) is a genus of about 24 accepted Fabaceae herbs and subshrubs native from Europe and the Mediterranean to Turkmenistan and N. Somalia, with jointed loment pods; C. varia is used for erosion control but is toxic and invasive.
Correa
Correa, Australian genus of 11 Rutaceae shrub species (native fuchsia), named for Portuguese botanist Correa da Serra; tubular nectar-rich flowers, frequent hybrids, popular garden plants.
Cortaderia
Cortaderia, pampas grass genus (C. selloana, C. jubata), a South American Danthonioideae tussock grass genus with plumose inflorescences, gynodioecious and apomictic reproduction, and invasive ornamental species.
Cortaderia selloana
Cortaderia selloana, pampas grass (plumero de la Pampa), a South American perennial tussock grass grown for its plumes; invasive in California, New Zealand, South Africa, and Spain, allergenic pollen, gynodioecious, wind-dispersed seeds.
Corydalis
Corydalis DC. (fumewort genus), a Papaveraceae/Fumarioideae genus of about 549 species native to the temperate Northern Hemisphere, defined by spurred four-petaled flowers, six stamens in two bundles, and isoquinoline-alkaloid-rich medicinal roots.
Corylus
Corylus is a genus of trees and shrubs in the birch family, native to the temperate Northern Hemisphere, whose species produce the edible nuts known as hazelnuts.
Corymbia
Corymbia, the bloodwood eucalypts, a genus of about 95 Australian and New Guinean Myrtaceae trees split from Eucalyptus in 1995; includes spotted gums and ghost gums; non-monophyletic, with Blakella proposed as a separate genus in 2024.
Corymbia citriodora
Corymbia citriodora, the lemon-scented gum (formerly Eucalyptus citriodora), is an Australian Myrtaceae tree from Queensland to NE New South Wales, grown for citronellal-rich essential oil, heavy-construction timber, and ornamental planting.
Costus
Costus L. (spiral gingers, Costaceae, Zingiberales): pantropical genus of 115 accepted rhizomatous herbs with spiromonostichous spiral leaves, cone-like inflorescences, and hummingbird and bee pollination syndromes; distinct from the medicinal costus root Saussurea costus.
Cota
Cota J.Gay is a genus of 37 daisy-family (Asteraceae, Anthemideae) herbs native to Eurasia, northwest Africa, and Alaska to Canada; formerly a section of Anthemis, recognized as an independent genus on molecular evidence in 2010, with type species Cota tinctoria, golden chamomile.
Cotinus
Cotinus (smoketree, smoke bush) is a genus of seven accepted deciduous shrubs and small trees in Anacardiaceae, native from southern Central Europe to China and the southeastern USA to NE Mexico; C. coggygria is the widespread ornamental species.
Cotoneaster
Cotoneaster, a Rosaceae genus of berry-bearing shrubs native to temperate Eurasia and North Africa, with 270 to 400 species, apomictic polyploid taxonomy, and several invasive ornamental species.
Cotton
Cotton (Gossypium spp.), also called upland cotton (Gossypium hirsutum) or Pima (G. barbadense), is the world's dominant natural textile fiber, a nearly pure cellulose single-celled seed trichome; domesticated millennia ago and grown mainly in China, India, Brazil, and the United States.
Cotula
Cotula (button daisies, brassbuttons) is a genus of about 51 Asteraceae herbs in tribe Anthemideae, native from Africa to Australasia, with small disciform button-like flower heads; distinct from Anthemis cotula, stinking chamomile.
Cotula coronopifolia
Cotula coronopifolia (brass buttons, buttonweed) is a southern African Asteraceae wetland herb, invasive in Europe, North America, and Australasia; it is halotolerant, spreads via waterbird gut passage, and was first recorded wild in Britain in 1869.
Couma
Couma is a genus of five species of latex-yielding trees in the dogbane family, native to Central and South America and harvested in the Amazon for its sweet latex, sorva.
Couroupita guianensis
Couroupita guianensis, the cannonball tree, is a Lecythidaceae tree native from Panama to tropical South America, grown widely as an ornamental. Cauliflorous fragrant flowers, 20 cm cannonball-like fruits with up to 300 seeds, IUCN Least Concern.
Cowpea
Cowpea (Vigna unguiculata, black-eyed pea) is an African legume domesticated in West Africa 5,000-6,000 years ago, grown on about 12 million hectares for seed protein, fodder, and soil-improving nitrogen fixation.
Crambe
Crambe L. is a Brassicaceae genus of about 30-37 herb species from Europe, Macaronesia, and Asia, whose type species is sea kale; C. abyssinica is an industrial oilseed crop rich in erucic acid.
Cranberry
Cranberry (Vaccinium macrocarpon, American or large cranberry) is a North American bog-grown Ericaceae fruit crop first cultivated around 1810 in Massachusetts, used in sauces and supplements, and shown to modestly reduce recurrent UTI risk in women.
Crassula
Crassula is a cosmopolitan genus of about 200-220 succulent Crassulaceae species, mostly southern African, with opposite leaves, single-whorl stamens, origin in the Greater Cape Floristic Region about 46 Mya, and the jade plant C. ovata.
Crassula muscosa
Crassula muscosa (watch chain, rattail crassula, princess pine) is a South African and Namibian Crassulaceae succulent subshrub with four-ranked scale-like leaves on wiry stems, described by Linnaeus in 1760, Least Concern, widely cultivated.
Crassula ovata
Crassula ovata, the jade plant (also money plant, lucky plant; Japanese kanenonaruki カネノナルキ), is a succulent Crassulaceae shrub native from SE Mozambique to South Africa's Cape, widely grown as a houseplant; synonym Crassula argentea, Least Concern.
Crassulaceae
Crassulaceae, the stonecrop family, is a Saxifragales family of about 1,400-1,500 succulent species in three subfamilies, including Sedum, Echeveria, Kalanchoe, and Sempervivum, and gave its name to CAM photosynthesis.
Crataegus
Crataegus (hawthorn) is a Rosaceae genus of thorny shrubs and small trees of temperate Eurasia and North America, with roughly 150–260 species, complicated by hybridization, polyploidy, and apomixis.
Crataegus monogyna
Crataegus monogyna, common or single-seed hawthorn (aubepine), a thorny Rosaceae tree native from Europe to Iraq and North Africa, widely naturalized and invasive in North America and Australia, used medicinally.
Cream of Wheat
Cream of Wheat is an American brand of farina, a smooth hot breakfast cereal created in 1893 at a flour mill in Grand Forks, North Dakota, and now owned by B&G Foods.