Cereoid ID?

[Frank103]

Here is a nice columnar cactus that I photographed at the Lanzarote Jardin de Cactus last month (please see my travelogue for more).

Is it a Pachycereus?

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A Pilosocereus??

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[Peter]

Looks rather like a Rooksbya Euphorbioides (aka Neobuxbaumia Euphorbioides).

[topsy]

Hi,

What a smashing plant, but I am afraid that it is not Rooksbeya, that has a much fuller flower and does not have the scales on the outside of the flower stem, I believe the plant you saw was Pachycereus pringlii. They are very spiny as young plants in our collections but when they mature they do not bother to produce the long spines, this defence no longer being needed, they are above the animals which might eat them.

Regards,

Suzanne Mace
Mesemb Study Group

[Phil_SK]

Yes, Pachycereus pringlei was my first thought too.

[Frank103]

Hi,

What a smashing plant, but I am afraid that it is not Rooksbeya, that has a much fuller flower and does not have the scales on the outside of the flower stem, I believe the plant you saw was Pachycereus pringlii. They are very spiny as young plants in our collections but when they mature they do not bother to produce the long spines, this defence no longer being needed, they are above the animals which might eat them.

Regards,

Suzanne Mace
Mesemb Study Group

Thanks Suzanne and Phil!
This was a name that I had considered too, but they had another equally beautiful cereoid which they named P. pringlii but which looked a little different (see below). Just natural variation?

Pachycereus pringlei

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Pachycereus pringlei

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[Agavegeoff]

pringlei for sure.
This down Mexico way.

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