Melampodium is a genus of flowering plants in the sunflower family.
Ambrosia artemisiifolia, with the common names common ragweed, annual ragweed, and low ragweed, is a species of the genus Ambrosia native to regions of the Americas.
Anthemis cotula, also known as stinking chamomile, or mayweed, is a flowering annual plant with a noticeable and strong odor. The odor is often considered unpleasant, and it is from this that it gains the common epithet "stinking". In pre-colonial times, its distribution was limited to the Old Continent and Africa; though it was established in most of Europe, it was not present in Finland, Ireland, or the northernmost reaches of Scotland, in spite of the fact that these countries feature climatic regions favorable to this plant and are in proximity to countries where the species is native, such as Russia, Estonia, Lithuania and England. It has successfully migrated to the American continents where it can be found growing in meadows, alongside roads, and in fields.
Ageratum houstonianum, commonly known as flossflower, bluemink, blueweed, pussy foot or Mexican paintbrush, is a cool-season annual plant often grown as bedding in gardens.
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.
Lactuca serriola, also called prickly lettuce, milk thistle, compass plant, and scarole, is an annual or biennial plant in the tribe Cichorieae within the family Asteraceae. It has a slightly fetid odor and is commonly considered a weed of orchards, roadsides and field crops. It is the closest wild relative of cultivated lettuce.
Chromolaena odorata is a tropical and subtropical species of flowering shrub in the family Asteraceae. It is native to the Americas, from Florida and Texas in the United States south through Mexico and the Caribbean to South America. It has been introduced to tropical Asia, West Africa, and parts of Australia.
Acanthospermum humile is a species of plants in the family Asteraceae. It is native to the West Indies but naturalized in parts of South America, Central America, and North America.
Cosmos sulphureus is a species of flowering plant in the sunflower family Asteraceae, also known as sulfur cosmos and yellow cosmos. It is native to Mexico, Central America, and northern South America, and naturalized in other parts of North and South America as well as in Europe, Asia, and Australia.
Acanthospermum australe is a South American species of herbaceous plants first described as a species in 1758.
Emilia sonchifolia, also known as lilac tasselflower or cupid's shaving brush, is a tropical flowering species of tasselflower in the sunflower family. It is widespread in tropical regions around the world, apparently native to Asia and naturalized in Africa, Australia, the Americas, and various oceanic islands.
Crupina is a small genus of plants in the tribe Cardueae within the family Asteraceae.
Cyperus difformis is a species of sedge known by several common names, including variable flatsedge, smallflower umbrella-sedge and rice sedge. This plant is native to southern Europe, most of Africa and Asia, and Australia, and it is naturalized in other areas of the world, including large parts of the Americas.
Melanthera, is a genus of perennial flowering plants in the family Asteraceae, native to North and South America, as well as Africa, Asia and Oceania, including Hawaiʻi.
Synedrella is a genus of flowering plants in the family Asteraceae.
Bidens triplinervia is a Latin American species of flowering plants in the sunflower family. It is native to Mesoamerica and South America, from Chihuahua State in northern Mexico to Jujuy Province 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.
Flaveria bidentis, the coastal plain yellowtops, is a South American plant species of Flaveria within the family Asteraceae. It is native to South America, and naturalized in many places.
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.
