Question: Coryphantha and Solenopsis, are types of what?

full_context: Document 1: Escobaria sneedii: Escobaria sneedii (syn. "Coryphantha sneedii") is a rare species of cactus known by the common names Sneed's pincushion cactus and carpet foxtail cactus. It is native to the Chihuahuan Desert, where it occurs in scattered locations in New Mexico, Texas, and Chihuahua. Some plants occurring in Arizona may be included within this species. Botanical authors do not necessarily agree on the circumscription of this species. Most will agree at this point in the research, however, that there are two varieties of "Escobaria sneedii", and that both are rare and endangered. The plant is popular with cactus enthusiasts and dealers because of its often petite size and tolerance for moderately cold climates. They have been overharvested from their natural habitat, the main reason why the two varieties, var. "sneedii" and var. "leei", have been federally listed as endangered and threatened, respectively.
Document 2: Coryanthes: Coryanthes, commonly known as bucket orchids, is a genus of tropical epiphytic orchids. This genus is abbreviated as Crths in horticultural trade. They are native to South America, Central America, Mexico and Trinidad.
Document 3: Echinopsis: Echinopsis is a large genus of cacti native to South America, sometimes known as hedgehog cactus, sea-urchin cactus or Easter lily cactus. One small species, "E. chamaecereus", is known as the peanut cactus. The 128 species range from large and treelike types to small globose cacti. The name derives from "echinos" hedgehog or sea urchin, and "opsis" appearance, a reference to these plants' dense coverings of spines.
Document 4: Mammillaria: The genus Mammillaria is one of the largest in the cactus family (Cactaceae), with currently 200 known species and varieties recognized. Most of the mammillarias are native to Mexico, but some come from the southwest United States, the Caribbean, Colombia, Venezuela, Guatemala and Honduras. The common name "pincushion cactus" refers to this and the closely related genus "Escobaria".
Document 5: Cylindropuntia imbricata: The cane cholla (or walking stick cholla, tree cholla, chainlink cactus, etc.) (Cylindropuntia imbricata) is a cactus found in the Southwestern United States and northern Mexico, including some cooler regions in comparison to many other cacti. It occurs primarily in the arid regions of the Southwestern United States in the states of Oklahoma, Texas, New Mexico, Arizona, Colorado, and Nevada. It is often conspicuous because of its shrubby or even tree-like size, its silhouette, and its long-lasting yellowish fruits.
Document 6: Campanula garganica: Campanula garganica (Adriatic bellflower), syn. "C. elatines" var. "garganica", is a species of flowering plant in the genus "Campanula" of the family Campanulaceae, native to Southern Europe. It is a small, spreading herbaceous perennial growing to 5 cm . Basal rosettes of leaves bear a profusion of star-shaped blue flowers in summer.
Document 7: Sarcopoterium: Sarcopoterium is a genus of flowering plants in the rose family. The genus is synonymous to "Poterium". The sole species within this genus, Sarcopoterium spinosum, is common to the southeast Mediterranean region and Middle East. It is a perennial bush with small flowers in inflorescence. "Sarcopoterium spinosum" flowers in February to April and its fruits mature in autumn, then fall to earth to germinate with the rain water.
Document 8: Cyclamen repandum: Cyclamen repandum, the spring sowbread, is a species of flowering plant of the family Primulaceae, native to southern Europe and some Mediterranean islands. It is the most widespread of a group of cyclamens (genus "Cyclamen" subgenus "Psilanthum") with wide, heart-shaped leaves, often coarsely toothed or lobed, and late spring-blooming flowers with long, slender petals.
Document 9: Escobaria: Escobaria, pincushion cactus or foxtail cactus is a genus of low-growing cacti that range from the southernmost parts of central and western Canada through northern Mexico, with one species in Cuba. The genus comprises about 23 species. The term "pincushion cactus" may also refer to the related "Mammillaria".
Document 10: Ceratozamia: Ceratozamia is a genus of New World cycads in the family Zamiaceae. The genus contains 27 known currently living species and one or two fossil species. Most species are endemic to mountainous areas of Mexico, while few species extend into the mountains of Guatemala, Honduras and Belize. The genus name comes from the Greek "ceras", meaning horn, which refers to the paired, spreading horny projections on the male and female sporophylls of all species.
Document 11: Isoplexis: Isoplexis is a section of 4 species of flowering plants within the genus "Digitalis" in the plantain family Plantaginaceae. The species of section Isoplexis differ from other plants in the genus "Digitalis" in that their monosymmetric (sometimes called zygomorphic) flowers have a distinctive large upper lip rather than large lower lip and the species are endemic to the Canary Islands (the species "D. canariensis", "D. chalcantha", and "D. isabelliana") and Madeira ("D. sceptrum").
Document 12: Solenopsis (plant): Solenopsis is a genus of plants in the Campanulaceae. It is native to the Mediterranean region from Portugal and the Canary Islands east to Turkey.
Document 13: Cynara: Cynara is a genus of thistle-like perennial plants in the sunflower family. They are native to the Mediterranean region, the Middle East, northwestern Africa, and the Canary Islands. The genus name comes from the Greek "kynara", which means "artichoke".
Document 14: Campanula portenschlagiana: Campanula portenschlagiana syn. "C. muralis", is a species of flowering plant in the family Campanulaceae, native to the Dalmatian Mountains in Croatia. It is a vigorous, low-growing, mound-forming evergreen perennial with deep purple flowers in summer. Common names include Dalmatian bellflower, Adria bellflower and wall bellflower.
Document 15: Coryphantha: Coryphantha (from Greek, "flowering on the top"), or beehive cactus, is a genus of small to middle-sized, globose or columnar cacti. The genus is native to arid parts of Central America, Mexico, through Arizona, New Mexico, and western Texas and north into southwestern, central, and southeastern Montana. With its two subgenera, 57 species and 20 subspecies, it is one of the largest genera of cactus.
ground_truth: plants