Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All species are woody, contain essential oils, and have flower parts in multiples of four or five. The leaves are evergreen, alternate to mostly opposite, simple, and usually entire. The flowers have a base number of five petals, though in several genera, the petals are minute or absent. The stamens are usually very conspicuous, brightly coloured, and numerous.
Hamamelidaceae, commonly referred to as the witch-hazel family, is a family of flowering plants in the order Saxifragales. The clade consists of shrubs and small trees positioned within the woody clade of the core Saxifragales. An earlier system, the Cronquist system, recognized Hamamelidaceae in the Hamamelidales order.
Rhaponticum repens, synonyms including Acroptilon repens and Leuzea repens, with the common name Russian knapweed, is a species of bushy rhizomatous perennial, up to 80 cm tall. Stems and leaves are finely arachnoid-tomentose becoming glabrous and green with age. The rosette leaves are oblanceolate, pinnately lobed to entire, 2–3 cm wide by 3–8 cm long. The lower cauline leaves are smaller, pinnately lobed; the upper leaves become much reduced, sessile, serrate to entire. The heads are numerous terminating the branches. Flowers are pink to purplish, the marginal ones not enlarged. The outer and middle involucral bracts are broad, striate, smooth with broadly rounded tips; the inner bracts are narrower with hairy tips. Pappus present with bristles 6–11 mm long. Fruit is a whitish, slightly ridged achene.
Onopordum, or cottonthistle, is a genus of plants in the tribe Cardueae within the family Asteraceae. They are native to southern Europe, northern Africa, the Canary Islands, the Caucasus, and southwest and central Asia. They grow on disturbed land, roadsides, arable land and pastures.
Xeranthemum is a genus of flowering plants in the tribe Cardueae within the family Asteraceae, native to Southern Europe. It has silvery flower heads with purplish tubular flowers.
The Heliantheae are the third-largest tribe in the sunflower family (Asteraceae). With some 190 genera and nearly 2500 recognized species, only the tribes Senecioneae and Astereae are larger. The name is derived from the genus Helianthus, which is Greek for sun flower. Most genera and species are found in North America and South America. A few genera are pantropical.
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.
Rhaponticum is a genus of flowering plants in the tribe Cardueae within the family Asteraceae. As of November 2023, it is accepted by Plants of the World Online, but rejected by the Global Compositae Database in favour of Leuzea.
Serratula is a genus of plants in the tribe Cardueae within the family Asteraceae native to Eurasia. Plumeless saw-wort is a common name for plants in this genus. Serratula as traditionally defined contains at least two groups: one of which is basal within the subtribe Centaureinae and one of which is derived; the former group can be moved to the genus Klasea.
The genus Cousinia of the tribe Cardueae is in its current circumscription one of the larger genera in the Asteraceae, with approximately 650-700 described species distributed in central and western Asia.
Amberboa is a genus of flowering plants in the tribe Cardueae within the family Asteraceae, described as a genus in 1832.
Thevenotia is a genus of Asian plants in the tribe Cardueae within the family Asteraceae which found in western and central Asia.
Siebera is a genus of flowering plants in the tribe Cardueae in the family Asteraceae, native to Western Asia.
Myopordon is a genus of flowering plants in the tribe Cardueae within the family Asteraceae which found in Middle-East.
Callicephalus is a monotypic genus of flowering plants in the family Asteraceae, containing the single species Callicephalus nitens. It is native to the middle and low mountains of the Caucasus, where it has been recorded in Armenia, Azerbaijan, Georgia, Russia, and Turkey.
Carduncellus is a genus of flowering plants in the tribe Cardueae within the family Asteraceae. They are native to the western Mediterranean and surrounding regions.
Rhaponticum scariosum, common name giant scabiosa, is a perennial herbaceous flowering plant of the genus Rhaponticum of the family Asteraceae.
Echinops spinosissimus is a European species of plant in the tribe Cardueae within the family Asteraceae. It is native to southeastern Europe, northern Africa, and southwest Asia as far east as Iran.
The taxonomy of Tulipa places the genus in the family Liliaceae, and subdivides it as four subgenera, and comprises about 75 species.
Ambrosiinae is a subtribe of flowering plants in the tribe Heliantheae, and is endemic to the Americas.
