tall columnar unknown

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palmbob Acton, CA(Zone 8b) Feb 10, 2015

still don't know what this one is, either

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DaisyPlantLady Reno, NV(Zone 6b) Feb 11, 2015

That has the same spine pattern as a Ferocactus. I can't think of one that is tall and skinny like that though.

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DaisyPlantLady Reno, NV(Zone 6b) Feb 15, 2015

Has this one ever bloomed? It looks pretty well established. I'm going to say an Echinopsis with huge flowers. White?

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mcvansoest Mesa, AZ(Zone 9b) Feb 15, 2015

Check out: Echinopsis/Trichocereus tacaquirensis, or E/T chiloensis.

The new growth on the cactus in the picture looks a lot like a longer spined version of the T. tacaquirensis that I have, but on the older part of the plant in the pictures the spinage looks different.

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palmbob Acton, CA(Zone 8b) Feb 16, 2015

It has never bloomed... and in its new location where it seems rather marginal (gets a tad bit of freeze damage yearly) I doubt it ever will. But that's one thing that keeps me from thinking it's E chiloensis, as that plant is very hardy (and I have one growing just a few feet away from this one- flowering nicely yearly and much much smaller.

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mcvansoest Mesa, AZ(Zone 9b) Feb 16, 2015

Then maybe it is tacaquirensis - I know it comes in a pretty long spined version. I had trouble with the ID on mine until I found a bunch of pictures somewhere on the internet that showed both the long spined and the short spined version.

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DaisyPlantLady Reno, NV(Zone 6b) Feb 16, 2015

growth habit and spine conformation are right for E. tacaquirensis. Says here it gets 8 feet tall and is not frost hardy.

http://www.desert-tropicals.com/Plants/Cactaceae/Echinopsis_tacaquirensis.html

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palmbob Acton, CA(Zone 8b) Feb 16, 2015

Wow… that does indeed look like it. Thanks

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DaisyPlantLady Reno, NV(Zone 6b) Feb 16, 2015

You are welcome. One mystery solved. Now to get it to bloom. Are you going to move it to a more protected spot? Or?

Where did you move from (that was warmer) that you had to transplant your cactus (to colder)? And how cold does it get there (Acton)?

I moved from Central California (zone more 8 than 9) to Reno (zone 7) this last summer. Just enough to make a difference. Temps in Central CA in the mid-teens. So the cactus that can stand -5 degrees are in the yard. The rest are in the greenhouse (which is already too small).

If you need a few more that will survive mid-teens, let me know. I am traveling to CA this weekend and will box a few up for you.

Daisy

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