Cereus hexagonus

Cereus hexagonus (L.) Mill., Gard. Dict., ed. 8.: n.° 1 (1768) (syn: Acanthocereus thalassinus (Otto & A.Dietr.) Borg ; Cactus hexagonus L.Cactus octogonus Page ex Steud. ; Cactus peruvianus DC. ; Cactus regalis Spreng. ; Cephalocereus perlucens (K.Schum.) Borg ; Cereus horridus Otto ex Pfeiff. ; Cereus horridus var. alatosquamatus Werderm. ; Cereus karstenii Salm-Dyck ; Cereus karstenii Salm-Dyck ; Cereus longiflorus Alexander ; Cereus northumberlandianus Lamb. ; Cereus perlucens K.Schum. ; Cereus regalis Haw. ex Spreng. ; Cereus thalassinus Otto & A.Dietr. ; Cereus thalassinus var. quadrangularis C.F.Först. ; Pilocereus perlucens (K.Schum.) Werderm. ; Pilosocereus perlucens (K.Schum.) Byles & G.D.Rowley );
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N. South America to N. & NE. Brazil: Brazil North, Brazil Northeast, French Guiana, Guyana, Suriname, Venezuela, Venezuelan Antilles; Introduced into: Cuba, Dominican Republic, India, Jamaica, Leeward Is., Puerto Rico as per POWO;
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Cactus for ID, Anuppur, Madhya Pradesh, NAW-AUG18-03 : 8 posts by 2 authors. Attachments (3)
Kindly identify this cactus with huge white flowers photographed in July 2018 at a fence of a farm in Anuppur district, Madhya Pradesh.

Yes, appears close.

Cereus pterogonus
Cactaceae.


lists Cereus pterogonus as an “unresolved name”. Please clarify.
Could it be Cereus repandus?

Thanks, … Tropicos gives Cereus pterogonus as a syn. of Selenicereus testudo (Karw. ex Zucc.) Buxb.
Pl. also check references under Selenicereus testudo

Only the following species of Cereus are listed in India Flora Online (Cereus hexagonusCereus peruvianusCereus pterogonus) as per details herein.
Only 
Cereus hexagonus have distribution in the nearby area.

So I take it as Cereus hexagonus



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Hooghly Today : Cereus pterogonus Lem. (2nd time) ? : Attachments (7 + 4). 10 posts by 4 authors.
This one also is going to be difficult. Found some more info –

Today’s update….. (9.6.13)


very nice and thanks for taking the pictures of the flowers so nicely
I really wanted to see them open up.
now I will be aliitle more wishful (Greedy, if you like) and want to see the fruits …do they develope into the dragon fruit like fruits? being from the same genus?
so … … some more work for you, ha ha… but then that would complete the story of this plant…
not really,  then I would want to see the seeds !!!


Only the following species of Cereus are listed in India Flora Online (Cereus hexagonusCereus peruvianusCereus pterogonus) as per details herein.
Only 
Cereus hexagonus have distribution in the nearby area.

So I take it as Cereus hexagonus


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Hooghly Today : Cereus pterogonus Lemaire ?: I have a pocket field guide in Bengali that illustrates about 20 wild shrubs and a few climbers that can be found in bushes. This book, BANGLAR JHOPJHAR (Anirban Roy, pub. PASCHIMBANGA JIB-BAICHITRA PARSHAD) illustrates a plant, Cereus pterogonus Lemaire. The Bengali name mentioned in this book is TESHIRA (তেশিরা). This book also features a photograph of this plant.

Couldn’t find this genus in Bengal Plants or in any eflora.
But, “Hortus Suburbanus Calcuttensis” mentions the following Cereus species :-
  1. C. multangularis
  2. C. peruvianus
  3. C. hexagonus
  4. C. tetragonus
  5. C. speciosissimus
  6. C. repandus
  7. C. columnaris
  8. C. grandiflorus
  9. C. triangularis
  10. C. reptans
  11. C. setosus
  12. C. phyllanthoides
  13. C. truncatus
  14. C. ackermanni
  15. C. ovatus
  16. C. decorus
  17. C. nycticallus

This is a common plant in rural area and can attain a height of about 10 ft.


An image search for Cereus yields similar looking plants, and i think it might be accepted as Cereus sp, subject to experts’ views.


Only the following species of Cereus are listed in India Flora Online (Cereus hexagonusCereus peruvianusCereus pterogonus) as per details herein.
Only 
Cereus hexagonus have distribution in the nearby area.
So I take it as Cereus hexagonus


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References:
POWO  GBIF (High resolution specimens) India Flora Online  Wikimedia Commons  Useful Tropical Plants

Updated on August 30, 2025

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