Plant ID forum: ID please

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Name: Nikola Zivanovic
Perth, WA, Australia (Zone 10a)
Region: United States of America
Sep 25, 2016 10:58 AM CST

can you help me please about identification for my cactus? I tip my hat to you. Confused

Thumb of 2016-09-25/australiancactus/5443db

Name: sy
Northern Ireland (Zone 8a)
Region: United Kingdom Native Plants and Wildflowers Enjoys or suffers cold winters Birds The WITWIT Badge Container Gardener
Foliage Fan Sempervivums Houseplants Cactus and Succulents Region: New Mexico
Sep 29, 2016 2:43 AM CST
Is it cereus repandus?
Peruvian Apple (Cereus repandus)
Heat zone 1-2
South Australia
Oct 5, 2016 7:00 AM CST
Common name: Senita cereus, whisker cactus.
Family: Pachycereus
Botanic Name: Pachycereus schottii
Name: Thijs van Soest
Mesa, AZ (Zone 9b)
Region: Arizona Enjoys or suffers hot summers Cactus and Succulents Xeriscape Adeniums Hybridizer
Plant Identifier Plant and/or Seed Trader Cat Lover Dog Lover Lover of wildlife (Black bear badge) Lover of wildlife (Raccoon badge)
Oct 5, 2016 10:16 AM CST
Sorry, but it definitely is not a Senita. I can see why you might think that, but if you look in detail at the ribs and overall appearance of the two cacti you will see that the plant in the OP here is not a Senita.

Sy's ID is probably pretty close to what it is - a straight up Cereus of some sort - these occur is South America, can get really big. Will have large mostly white flowers that open at night and will stay open into the early morning. If fruit forms it will end up looking somewhat like an apple, hence the common name.

The Senita is a cactus that occurs mostly in Mexico and in southern Arizona, it also can get big multi branched, but not quite as massive as most Cerei. It is also a night bloomer, but gets much smaller pink-salmon colored flowers, that in my experience are usually closed up before dawn.

If I have time tonight I will try and post some pictures.

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