pachycereus

Pachycereus is a genus of 9–12 species of large cacti native to Mexico and just into southern Arizona, United States. They form large shrubs or small trees up to 15 m or more tall, with stout stems up to 1 m in diameter. Pachycereus comes from the ancient Greek pakhus meaning "thick" and the Latin cereus meaning "torch". P. pringlei is the tallest cactus species in the world, with a maximum recorded height of 19.2 m. Synonymy These genera have been brought into synonymy with Pachycereus:

PACHYCEREUS PECTEN-ABORIGINUM

PACHYCEREUS PRINGLEI

ADROMISCHUS
AEONIUM
AGAVE
ALOE
ANACAMPSEROS
ASTROPHYTUM
CEREUS
CHAMAECEREUS
CHAMAELOBIVIA
COPIAPOA
COTYLEDON
CRASSULA
CYANOTIS
DELOSPERMA
DIOSCOREA
ECHEVERIA
ECHINOCACTUS
ECHINOCEREUS
ECHINOFOSSULOCACTUS
ECHINOPSIS
ESPOSTOA
EUPHORBIA
FAUCARIA
FENESTRARIA
FEROCACTUS
FOCKEA
FRITHIA
GASTERIA
GRAPTOPETALUM
GRAPTOVERIA
GYMNOCALYCIUM
HAWORTHIA
HUERNIA
KALANCHOE
LITHOPS
LOBIVIA
MAMMILLARIA
MARGINATOCEREUS
MATUCANA
MELOCACTUS
MYRTILLOCACTUS
NEOBUXBAUMIA
NOTOCACTUS
OPUNTIA
OROSTACHYS
PACHYCEREUS
PACHYPHYTUM
PACHYPODIUM
PACHYVERIA
PARODIA
PEPEROMIA
PILOSOCEREUS
PLEPERONIA
POLASKIA
PORTULACARIA
REBUTIA
RHIPSALIS
ROSULARIA
SEDEVERIA
SEDUM
SEMPERVIVUM
SENECIO
SINOCRASSULA
STAPELIA
TITANOPSIS
TRICHOCEREUS
TRICHODIADEMA
VATRICANIA

Thanks for Dbpedia for part of the informations