Sonchus asper, the prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp-fringed sow thistle, or spiny-leaved sow thistle, is a widespread flowering plant in the tribe Cichorieae within the family Asteraceae.
Baccharis glutinosa is a species of flowering plant in the family Asteraceae known by the common names saltmarsh baccharis and Douglas' falsewillow.
Eleocharis quinqueflora is a species of spikesedge known by the common names fewflower spikerush and few-flowered spike-rush. It is widespread across Europe, North Africa, northern Asia, and North America. There are also isolated populations in Argentina and Chile.
Galium divaricatum is a species of flowering plant in the coffee family known by the common name Lamarck's bedstraw.
Galium tricornutum is a species of flowering plant in the coffee family known by the common names rough corn bedstraw, roughfruit corn bedstraw, and corn cleavers. It is widespread across most of Europe plus northern Africa and southern Asia, from Norway, Portugal and Morocco to China. It is also naturalized in Australia, the Canary Islands, Mauritius, Madeira, Réunion, Brazil, Argentina, and scattered locales in North America.
Bahia ambrosioides is a South American species of flowering plants in the family Asteraceae. It is native to Chile including the Juan Fernández Islands.
Huarpea is a genus of flowering plants in the family Asteraceae.
Tweedia is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1835. The genus is native to South America. An ornamental plant, Oxypetalum coeruleum, formerly included in this genus is commonly referred to as "tweedia".
- Tweedia andina(Phil.) G.H.Rua - Chile
- Tweedia aucaensisG.H. Rua - Argentina
- Tweedia australis(Malme) C. Ezcurra - Argentina
- Tweedia birostrata(Hook. & Arn.) Hook. & Arn. - Chile
- Tweedia brunonisHook. & Arn. - Argentina, Bolivia, Paraguay
- Tweedia echegarayi(Hieron.) Malme - Argentina
- Tweedia solanoides(Hook. & Arn.) Chittenden - Argentina, Brazil, Paraguay, Uruguay
Bidens aurea , the Arizona beggarticks, is a North American species of flowering plant in the family Asteraceae. It is widespread across much of Mexico and found also in Arizona and Guatemala. The species is also naturalized in parts of Europe and South America.
Bidens bipinnata is a common and widespread species of flowering plant in the family Asteraceae.
Brickellia paniculata is a Mesoamerican species of flowering plant in the family Asteraceae. It is widespread from Tamaulipas west to Sinaloa and south as far as Costa Rica.
Brickellia diffusa is a Latin American species of flowering plants in the family Asteraceae. It is widespread across much of South America, Central America, Mexico, Galápagos, and the West Indies. Its distribution stretches from Sonora and Tamaulipas in northern Mexico to Jujuy in northern Argentina.
Elephantopus mollis, common names tobacco weed, and soft elephantsfoot, is a tropical species of flowering plant in the family Asteraceae.
Erechtites valerianifolius, common name tropical burnweed is a New World species of plants in the sunflower family. It is native to Mexico, Central America, South America, and the West Indies. It is also naturalized as a weed in much of the tropical Old World.
Tagetes filifolia is a New World species of marigolds in the family Asteraceae. It is widespread across much of Latin America from northern Mexico to Argentina. Common name is Irish lace despite the fact that the plant does not grow in Ireland.
Gamochaeta pensylvanica, the Pennsylvania cudweed or Pennsylvania everlasting, is a widespread species of flowering plant in the family Asteraceae. It is native to South America and introduced into Eurasia, Africa, Australia, and North America. The pensylvanica epithet is a misnomer, as the plant is not native to Pennsylvania and only marginally naturalized there.
Gamochaeta simplicicaulis, the simple-stem cudweed or simple-stem everlasting, is a species of flowering plant in the sunflower family. It is native to South America and has become naturalized in Australia, New Zealand, and the southeastern United States.
Persicaria hydropiperoides is a New World species of flowering plant in the buckwheat family known by the common names swamp smartweed and false waterpepper. It is widespread across much of North America and South America. It grows in moist and wet habitats, and is sometimes semi-aquatic.
Hypochaeris microcephala, the smallhead cat's ear, is a species of plants in the tribe Cichorieae within the family Asteraceae. It is native to South America and naturalized in parts of North America.
Rubus geoides is a South American species of flowering plant in the rose family. It has been found only in the extreme southern part of the continent, in the Provinces of Tierra del Fuego, Santa Cruz, Río Negro, and Neuquén in Argentina, the adjacent Magallanes Region of Chile, and the Falkland Islands.
