#order_Opuntiales__Opuntiales  coextensive with the family Cactaceae: cactuses
  supertype:  plant_order__plantorder  the order of plants
  member of:  subclass_Caryophyllidae
  member:  family_Cactaceae__Cactaceae__cactus_family  constituting the order Opuntiales
     member:  cactus  any spiny succulent plant of the family Cactaceae native chiefly to arid regions of the New World
     member:  genus_Acanthocereus__Acanthocereus  mostly trailing cacti having nocturnal white flowers; tropical America and Caribbean region
     member:  genus_Aporocactus__Aporocactus  small genus of epiphytic cacti of Mexico
        member:  rattail_cactus__rat's-tail_cactus__Aporocactus_flagelliformis  commonly cultivated tropical American cactus having slender creeping stems and very large showy crimson flowers that bloom for several days
     member:  genus_Ariocarpus__Ariocarpus  slow-growing geophytic cacti; northern and eastern Mexico; southern Texas
        member:  living_rock__Ariocarpus_fissuratus  usually unbranched usually spineless cactus covered with warty tubercles and having magenta flowers and white or green fruit; resembles the related mescal; northeastern Mexico and southwestern United States
     member:  genus_Carnegiea__Carnegiea  caryophylloid dicot genus with only one species: saguaro
        member:  saguaro__sahuaro__Carnegiea_gigantea  extremely large treelike cactus of desert regions of southwestern United States having a thick columnar sparsely branched trunk bearing white flowers and edible red pulpy fruit
     member:  genus_Cereus__Cereus  genus of much-branched treelike or shrubby cacti with pronounced ribs and rounded needlelike spines and nocturnal flowers usually white
        member:  night-blooming_cereus  any of several cacti of the genus Cereus
     member:  genus_Coryphantha  mainly globose cacti of southwestern United States and Mexico covered with many nodules; superficially resembling and formerly included in genus Mammillaria
        member:  coryphantha  a cactus of the genus Coryphantha
     member:  genus_Echinocactus  globular or cylindrical cacti; southwestern United States to Brazil
        member:  echinocactus__barrel_cactus  any cactus of the genus Echinocactus; strongly ribbed and very spiny; southwestern United States to Brazil
     member:  genus_Echinocereus__Echinocereus  large genus of low-growing shrubby ribbed cacti of Mexico and southwestern United States
        member:  hedgehog_cereus  cactus of the genus Echinocereus
        member:  rainbow_cactus  a stout cylindrical cactus of the southwest United States and adjacent Mexico
     member:  genus_Epiphyllum  small genus of tropical American (mainly Central America) cacti
        member:  epiphyllum__orchid_cactus  any cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowers
     member:  genus_Ferocactus__Ferocactus  genus of nearly globular cacti of Mexico and southwestern United States: barrel cacti
        member:  barrel_cactus  a cactus of the genus Ferocactus: unbranched barrel-shaped cactus having deep ribs with numerous spines and usually large funnel-shaped flowers followed by dry fruits
     member:  genus_Gymnocalycium__Gymnocalycium  large genus of low-growing globular South American cacti with spiny ribs covered with many tubercles
     member:  genus_Harrisia__Harrisia  genus of slender often treelike spiny cacti with solitary showy nocturnal white or pink flowers; Florida and Caribbean to South America
     member:  genus_Hatiora__Hatiora  small genus of South American epiphytic or lithophytic cacti
        member:  Easter_cactus__Hatiora_gaertneri__Schlumbergera_gaertneri  spring-blooming South American cactus with oblong joints and coral-red flowers; sometimes placed in genus Schlumbergera
     member:  genus_Hylocereus__Hylocereus  genus of climbing or epiphytic tropical American cacti with angular stems and mostly white very fragrant flowers
        member:  night-blooming_Hylocereus_cactus__night-blooming_cereus  any of several cacti of the genus Hylocereus
     member:  genus_Lemaireocereus__Lemaireocereus  tropical American cacti usually tall and branching with stout spines and funnel-shaped flowers and globular or ovoid often edible fruit
        member:  Lemaireocereus_chichipe__chichipe  tall treelike Mexican cactus with edible red fruit
     member:  genus_Lophophora__Lophophora  two species of small cacti of northeastern Mexico and southwestern United States having rounded stems covered with jointed tubercles: mescal
        member:  mezcal__mescal__peyote__Lophophora_williamsii  a small spineless globe-shaped cactus; source of mescal buttons
     member:  genus_Mammillaria  large genus of cacti characterized chiefly by nipple-shaped protuberances or tubercles on their surface
        member:  mammillaria  any cactus of the genus Mammillaria
     member:  genus_Melocactus__Melocactus  genus of strongly ribbed globose or spheroid cacti of tropical South and Central America and the Caribbean
     member:  genus_Myrtillocactus__Myrtillocactus  small genus of arborescent cacti of Mexico and Central America
        member:  garambulla_cactus__garambulla__Myrtillocactus_geometrizans  arborescent cactus of western Mexico bearing a small oblong edible berrylike fruit
     member:  genus_Pediocactus__Pediocactus  low-growing cacti of the American Great Plains
        member:  Knowlton's_cactus__Pediocactus_knowltonii  small clustering cactus of southwestern United States; a threatened species
     member:  genus_Nopalea__Nopalea  a genus of the cactus family with scarlet flowers
        member:  nopal  any of several cacti of the genus Nopalea resembling prickly pears
     member:  genus_Opuntia__Opuntia  large genus of cactuses native to America: prickly pears
        member:  prickly_pear_cactus__prickly_pear__pricklypear  cacti having spiny flat joints and oval fruit that is edible in some species; often used as food for stock
        member:  Opuntia_cholla__cholla  arborescent cacti having very spiny cylindrical stem segments; southwestern United States and Mexico
     member:  genus_Pereskia__Pereskia__Peireskia__genus_Peireskia  genus of tropical American shrubby trees and woody climbers having slender branches with broad flat leaves and large panicles of flowers
        member:  Barbados_gooseberry__Barbados-gooseberry_vine__Pereskia_aculeata  West Indian woody scrambler with spiny stems and numerous fragrant white flowers in panicles followed by small yellow to orange fruits
     member:  genus_Rhipsalis__Rhipsalis  large genus of epiphytic or lithophytic unarmed cacti with usually segmented stems and pendulous branches; flowers are small followed by berrylike fruits
        member:  mistletoe_cactus  a plant of the genus Rhipsalis
     member:  genus_Schlumbergera__Schlumbergera  South American epiphytic or lithophytic cacti
        member:  Christmas_cactus__Schlumbergera_buckleyi__Schlumbergera_baridgesii  epiphytic cactus of Brazilian ancestry widely cultivated as a houseplant having jointed flat segments and usually rose-purple flowers that bloom in winter
     member:  genus_Selenicereus__Selenicereus  mostly epiphytic climbing cacti that bloom at night
        member:  night-blooming_Selenicereus_cactus__night-blooming_cereus  any of several night-blooming cacti of the genus Selenicereus
     member:  genus_Zygocactus__Zygocactus  small genus of Brazilian cacti having flat fleshy usually branched joints and showy red or pink flowers followed by red fleshy fruits
        member:  crab_cactus__Thanksgiving_cactus__Zygocactus_truncatus__Schlumbergera_truncatus  South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera

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