Pterostylis striata, commonly known as the mainland striped greenhood, is a species of orchid endemic to south-eastern mainland Australia.
 As with similar orchids, the flowering plants differ from those which are not flowering.
 The non-flowering plants have a rosette of leaves but the flowering plants have a single flower with leaves on the flowering spike.
 This greenhood has a white flower with prominent dark green stripes and a brown-tipped dorsal sepal with a thread-like tip.
 Mainland striped greenhoods were formerly described as "Pterostylis alata" but that species is now recognised as a Tasmanian endemic.
Pterostylis atriola, commonly known as the Snug greenhood, is a species of orchid endemic to Tasmania.
 As with similar orchids, the flowering plants differ from those which are not flowering.
 The non-flowering plants only have a rosette of leaves but the flowering plants have one or two rosettes on growths from the base and up to ten small, dark green, white and brown flowers on a relatively tall flowering spike.
 It is a rare species, only known from four widely separated populations.
Amesiella is a genus of orchids endemic to the Island of Luzon, in the Philippines.
 The genus is named for Oakes Ames (1874-1950), founder of the orchid herbarium at Harvard University.
Pterostylis rogersii, commonly known as the curled-tongue shell orchid, is a species of orchid endemic to the south-west of Western Australia.
 As with similar orchids, the flowering plants differ from those which are not flowering.
 The non-flowering plants have a rosette of leaves but the flowering plants lack a rosette and have a single flower with leaves on the flowering spike.
 This greenhood usually has a white and reddish-brown striped flower with a long, curved labellum and is found along the south coast between Binningup and Esperance.
Sphagnum is a genus of approximately 380 accepted species of mosses, commonly known as peat moss.
 Accumulations of "Sphagnum" can store water, since both living and dead plants can hold large quantities of water inside their cells; plants may hold 16–26 times as much water as their dry weight, depending on the species.
 The empty cells help retain water in drier conditions.
 Hence, as sphagnum moss grows, it can slowly spread into drier conditions, forming larger mires, both raised bogs and blanket bogs.
 These peat accumulations then provide habitat for a wide array of peatland plants, including sedges and ericaceous shrubs, as well as orchids and carnivorous plants.
 "Sphagnum" and the peat formed from it do not decay readily because of the phenolic compounds embedded in the moss's cell walls.
 In addition, bogs, like all wetlands, develop anaerobic soil conditions, which produces slower anaerobic decay rather than aerobic microbial action.
 Peat moss can also acidify its surroundings by taking up cations, such as calcium and magnesium, and releasing hydrogen ions.
 Under the right conditions, peat can accumulate to a depth of many meters.
 Different species of "Sphagnum" have different tolerance limits for flooding and pH, so any one peatland may have a number of different "Sphagnum" species.
Pterostylis hamiltonii, commonly known as the red-veined shell orchid, is a species of orchid endemic to the south-west of Western Australia.
 As with similar orchids, the flowering plants differ from those which are not flowering.
 The non-flowering plants have a rosette of leaves but the flowering plants lack a rosette and have a single flower with leaves on the flowering spike.
 This greenhood has a green and white, striped flower with reddish-brown markings and forms colonies, sometimes of thousands of plants.
Pterostylis alata, commonly known as the striped greenhood, is a species of orchid endemic to Tasmania.
 As with similar orchids, the flowering plants differ from those which are not flowering.
 The non-flowering plants have a rosette of leaves but the flowering plants have a single flower with leaves on the flowering spike.
 This greenhood has a white flower with prominent dark green stripes and a sharply pointed, brown-tipped dorsal sepal.
 Similar greenhoods growing on the Australian mainland were formerly known as "Pterostylis alata" but are now given the name "Pterostylis striata".
Barbarea (winter cress or yellow rocket) is a genus of about 22 species of flowering plants in the family Brassicaceae, native to temperate regions of the Northern Hemisphere, with the highest species diversity in southern Europe and southwest Asia.
 They are small herbaceous biennial or perennial plants with dark green, deeply lobed leaves and yellow flowers with four petals.
Pterostylis scabra, commonly known as the green-veined shell orchid, is a species of orchid endemic to the south-west of Western Australia.
 As with similar orchids, the flowering plants differ from those which are not flowering.
 The non-flowering plants have a rosette of leaves but the flowering plants lack a rosette and have a single flower with leaves on the flowering spike.
 This greenhood has a white flower with green and pale brownish-fawn stripes and a long, curved protruding labellum.
 It is found in inland areas between Kalbarri and Esperance.
Thelymitra, commonly known as sun orchids, is a genus of more than 100 species of plants in the orchid family, Orchidaceae.
 Unlike most other orchids, sun orchids lack a highly modified labellum and all three petals are similar in size, shape and colour.
 The column is, however highly modified and usually has prominent wings or glands which are helpful in identifying the species.
 Most sun orchids close their flowers at night, in cloudy or cool weather, giving rise to their common name.
 The scientific name means "woman's hood" and refers to the hooded column present in most, but not all species.
 Most species are endemic to Australia although some are found as far from there as the Philippines and Indonesia.
 The type species, "Thelymitra longifolia", the first to be formally described, was collected in New Zealand.

Question: Amesiella and Barbarea are both families of plants that can be found in Asia; the first referring to orchids endemic to the Philippines and the second to 22 different species of flowering plants but which name is given to such classifications of plants?
Answer: genus