https://www.llifle.com/Encyclopedia/CACTI/Family/Cactaceae/5576/Haageocereus_pseudomelanostele
Haageocereus pseudomelanostele
haageocereus
https://www.llifle.com/Encyclopedia/CACTI/Family/Cactaceae/31691/Haageocereus_tenuis
Haageocereus tenuis
haageocereus tenuis
https://www.huntington.org/collections/bot-40479
Haageocereus pseudomelanostele | Collections | The Huntington
the huntingtonhaageocereuscollections
https://rare-cacti.com/cereeae/haageocereus
rare-cacti.com - Haageocereus
A short description is also good.
rarecactihaageocereus