Arctium is a genus of biennial plants commonly known as burdock, family Asteraceae. Native to Europe and Asia, several species have been widely introduced worldwide. Burdock's clinging properties, in addition to providing an excellent mechanism for seed dispersal, led to the invention of the hook and loop fastener.
Prosopis is a genus of flowering plants in the family Fabaceae. It contains around 45 species of spiny trees and shrubs found in subtropical and tropical regions of the Americas, Africa, Western Asia, and South Asia. They often thrive in arid soil and are resistant to drought, on occasion developing extremely deep root systems. Their wood is usually hard, dense and durable. Their fruits are pods and may contain large amounts of sugar. The generic name means "burdock" in late Latin and originated in the Greek language.
Carduus is a genus of flowering plants in the family Asteraceae, and the tribe Cardueae, one of two genera considered to be true thistles, the other being Cirsium. Plants of the genus are known commonly as plumeless thistles. They are native to temperate Eurasia and North Africa, and several are known elsewhere as introduced species. This genus is noted for its disproportionately high number of noxious weeds compared to other flowering plant genera.
Helenium is a genus of annuals and herbaceous perennial plants in the family Asteraceae, native to the Americas.
Trixis is a genus of shrubs in the family Asteraceae, native to North and South America including the West Indies.
Loasa is a genus of flowering plants in the family Loasaceae. The genus contains about 100 species native to Central and South America. Species of Loasa are prickly herbs or shrubs that have nettle-like stinging hairs. Some species of Loasa are grown as ornamental plants and are known as Chile nettle. Its flowers have five yellow petals covering united stamens and distinctive large coloured nectaries. Caiophora is a closely related genus that also has stinging hairs and is found on rocky slopes of the Andes.
The Cardueae are a tribe of flowering plants in the daisy family (Asteraceae) and the subfamily Carduoideae. Most of them are commonly known as thistles; four of the best known genera are Carduus, Cynara, Cirsium, and Onopordum.
Navarretia is a genus of flowering plants related to the phloxes and the gilias. This is one genus of plants, among others, which are sometimes called pincushion plants. It includes 45 species native to the Americas. In North America they range from western Canada through the western and west-central United States to northwestern Mexico, and to Ohio and Pennsylvania. In South America they range through Argentina and Chile.
Danthonia is a genus of Eurasian, North African, and American plants in the grass family. Members of this genus are sometimes referred to as oatgrass, but that common name is not restricted to this genus. Other common names include heathgrass and wallaby grass. Australian species have since been reclassified into the genus Rytidosperma.
Pluchea is a genus of flowering plants in the tribe Inuleae within the family Asteraceae. Members of this genus might be known as camphorweeds, plucheas, or less uniquely fleabanes. Some, such as P. carolinensis and P. odorata, are called sourbushes. There are plants of many forms, from annual and perennial herbs to shrubs and trees, and there is variation in the morphology of leaves, flowers, and fruits.
Bothriochloa is a common and widespread genus of plants in the grass family native to many countries on all inhabited continents and many islands. They are often called beardgrass, bluegrass or bluestem. Some species are invasive in areas where they have been introduced.
Polypogon is a nearly cosmopolitan genus of plants in the grass family, commonly known beard grass or rabbitsfoot grass.
Amblyopappus is a genus of flowering plants in the family Asteraceae described as a genus in 1841.
Layia is a genus of flowering plants in the family Asteraceae known generally as tidy tips, native to western North America. Several are California endemics.
Araujia is a small genus of perennial vines in the dogbane family first described as a genus in 1817. The group is native to South America.
Trichocline is a genus of Australian and South American plants in the tribe Mutisieae within the family Asteraceae. It consists of one species from Australia (T. spathulata) and twenty-three from South America.
Gochnatia is a genus of flowering plants in the daisy family, Asteraceae. It is named for botanist Frédéric Karl Gochnat. The genus contains mainly shrubs and subshrubs, with a few trees and herbs. All of the species are native to the American tropics. Two species native to the mountains of Southeast Asia and formerly included here are now separated as the genus Leucomeris in subfamily Wunderlichioideae.
Schkuhria is a genus of flowering plants in the tribe Bahieae within the family Asteraceae. False threadleaf is a common name. The genus was named in honour of Christian Schkuhr (1741-1811), a German gardener and physical scientist at the University of Wittenberg.
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
Viviania is a genus of flowering plants belonging to the family Francoaceae.
