Differences between "T. valdezianus" and "T. valdezianus v. albiflorus"

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yonnoy
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Differences between "T. valdezianus" and "T. valdezianus v. albiflorus"

Post by yonnoy » Sun Jun 20, 2021 6:46 pm

Hello, it's known that T. valdezianus is 3-5 cm high and 1-2 cm in diameter and I've read that T. valdezianus v. albiflorus is bigger, but I don't know how much.

Do you know all the other differences between "T. valdezianus" and "T. valdezianus v. albiflorus"? (without considering the color of the flowers). I have some of them but they're too small yet.
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iann
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Re: Differences between "T. valdezianus" and "T. valdezianus v. albiflorus"

Post by iann » Sun Jun 20, 2021 8:34 pm

I haven't noticed any size difference between var valdezianus and var albiflorus. Var albiflorus appears less densely-spined, with more of the green body visible. I haven't counted if there is an actual difference in the spine counts, but the appearance is quite distinct. Flowers are different obviously. Here's two plants that show what I'm describing.
valdezianus-0412.jpg
valdezianus-0405.jpg
Cheshire, UK
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Aiko
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Re: Differences between "T. valdezianus" and "T. valdezianus v. albiflorus"

Post by Aiko » Sun Jun 20, 2021 8:45 pm

Maybe the flowering sequence is a bit different. But probably not much, if at all. I get the idea the white flowering ones are a bit earlier than the pink ones. But that needs to be observed for many years in a row, but it might just as well be the other way around in other years.
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Rob
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Re: Differences between "T. valdezianus" and "T. valdezianus v. albiflorus"

Post by Rob » Sun Jun 20, 2021 8:52 pm

The best way to tell them apart out of flower is supposedly that albiflorus plants have a yellow centre to the areole, pink flowered plants are white, I think this does just about show up in Ian's photos above, but I'm not certain how reliable it is. Its not something I have particularly studied, just something I have picked up along the way.
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