cactus without a name

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cristina Temuco, Chile(Zone 9b) Aug 29, 2015

Hello

I have a cactus that seems to be difficult to identify.
I posted photos in Davesgarden Identification forum and they all answered my quieres but without success, they are all wonderful when it comes to helping me identify plants.

But this cactus is proving a bit of a mystery.

Can some here in the forum help me identify what cactus it could be.

At first I believed it was a mammillaria , that was when it was smaller, then it was suggested that it could be a Thelocactus .....I looked up Thelocactus and none of the images I found looked like my cactus.

Help please.

Thanks
Cristina


This message was edited Aug 29, 2015 2:43 PM

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cristina Temuco, Chile(Zone 9b) Aug 29, 2015

oops sory forgot to upload photos

Thumbnail by cristina Thumbnail by cristina
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mcvansoest Mesa, AZ(Zone 9b) Aug 29, 2015

It could a Coryphanta of some sort that is not getting enough sunlight.

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DaisyPlantLady Reno, NV(Zone 6b) Aug 29, 2015

Cristina chose to edit out the link to her query on the Plant ID Forum. Here it is:

http://davesgarden.com/community/forums/t/1404381/

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cristina Temuco, Chile(Zone 9b) Aug 30, 2015

Thanks for the response, you could be right mcvansoest, as for lack of sun, I do live in southern Chile and we are currently in winter. But the cactus sits on a shelf , top shelf on a decking with clear PVC roof and seems to get full sun during the day.

Any suggestions?
Thanks
Cristina

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helenchild Decatur, GA Aug 30, 2015

Cristina, I think I would stop watering and especially stop fertilizing your plant to discourage it trying to grow during the short day season.

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Baja_Costero Baja California, Mexico(Zone 11) Aug 30, 2015

Reducing water is probably a good idea. Just as a side note, it's not full sun if there's something between your plant and the sun. Even clear plastic will filter sunlight, depending on the material, and especially UV. Roofing collects dirt on top which can reduce transmission even more.

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