#cactus  any spiny succulent plant of the family Cactaceae native chiefly to arid regions of the New World
  supertype:  succulent  a plant adapted to arid conditions and characterized by fleshy water-storing tissues that act as water reservoirs
  member of:  family_Cactaceae
  subtype:  pitahaya_cactus__pitahaya__Acanthocereus_tetragonus__Acanthocereus_pentagonus  cactus of the southwestern United States and northern Mexico having edible juicy fruit
  subtype:  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
  subtype:  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
  subtype:  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
  subtype:  night-blooming_cereus  any of several cacti of the genus Cereus
  subtype:  coryphantha  a cactus of the genus Coryphantha
  subtype:  echinocactus__barrel_cactus  any cactus of the genus Echinocactus; strongly ribbed and very spiny; southwestern United States to Brazil
     subtype:  hedgehog_cactus  cactus of the genus Echinocactus having stout sharp spines
     subtype:  golden_barrel_cactus__Echinocactus_grusonii  large cactus of east central Mexico having golden to pale yellow flowers and spines
  subtype:  hedgehog_cereus  cactus of the genus Echinocereus
  subtype:  rainbow_cactus  a stout cylindrical cactus of the southwest United States and adjacent Mexico
  subtype:  epiphyllum__orchid_cactus  any cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowers
  subtype:  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
  subtype:  Easter_cactus__Hatiora_gaertneri__Schlumbergera_gaertneri  spring-blooming South American cactus with oblong joints and coral-red flowers; sometimes placed in genus Schlumbergera
  subtype:  night-blooming_Hylocereus_cactus__night-blooming_cereus  any of several cacti of the genus Hylocereus
  subtype:  Lemaireocereus_chichipe__chichipe  tall treelike Mexican cactus with edible red fruit
  subtype:  mezcal__mescal__peyote__Lophophora_williamsii  a small spineless globe-shaped cactus; source of mescal buttons
  subtype:  mammillaria  any cactus of the genus Mammillaria
  subtype:  feather_ball__featherball__mammillariaplumosa  a low tuberculate cactus with white feathery spines; northeastern Mexico
  subtype:  garambulla_cactus__garambulla__Myrtillocactus_geometrizans  arborescent cactus of western Mexico bearing a small oblong edible berrylike fruit
  subtype:  Knowlton's_cactus__Pediocactus_knowltonii  small clustering cactus of southwestern United States; a threatened species
  subtype:  nopal  any of several cacti of the genus Nopalea resembling prickly pears
  subtype:  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
     subtype:  Opuntia_lindheimeri__nopal  cactus having yellow flowers and purple fruits
     subtype:  Opuntia_tuna__tuna  tropical American flat-jointed prickly pear; Jamaica
  subtype:  Opuntia_cholla__cholla  arborescent cacti having very spiny cylindrical stem segments; southwestern United States and Mexico
  subtype:  mistletoe_cactus  a plant of the genus Rhipsalis
  subtype:  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
  subtype:  night-blooming_Selenicereus_cactus__night-blooming_cereus  any of several night-blooming cacti of the genus Selenicereus
     subtype:  queen_of_the_night__Selenicereus_grandiflorus  tropical American climbing cactus having triangular branches; often cultivated for its large showy night-blooming flowers followed by yellow red-streaked fruits
  subtype:  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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