Oreocerus sp.

[jfdocampo]

I'd like to know the species if possible. Pictures taken in Mount Vesuvius. 13th May, 2018.

IMG_20180513_184018_resize.jpg (81.59 KiB) Viewed 827 times

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Regards,

[teo]

O. trollii ?

[jfdocampo]

Thanks teo. It could be, but I found O. celsianus very similar too. Do you know how to differentiate both species?

[nona]

Thanks teo. It could be, but I found O. celsianus very similar too. Do you know how to differentiate both species?

With Trolli, wool is dense and thin spines protrude. With Celsianus, skin, areoles, and heavier spines
are most visible. Trolli is more rot-prone in my experience.

[jfdocampo]

Thank you nona. So, do you think mine is Oreocereus trollii then?

[nona]

Thank you nona. So, do you think mine is Oreocereus trollii then?

That would be my guess. I've bought both commercially. Here are the labels.

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[jfdocampo]

Great. Thank you so much.

[DaveW]

Oreocereus trollii also usually offsets at the base much smaller than O. celsianus does having a more sprawling habit rather than growing upright.

http://www.llifle.com/Encyclopedia/CACT ... us_trollii

http://www.llifle.com/Encyclopedia/CACT ... _celsianus

[jfdocampo]

Fantastic Dave. Good to know it.

[nona]

Here's one I thought was Trolli until I saw the label.

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[DaveW]

Yes O. leucotrichus is usually more yellowish spined.

http://www.chileflora.com/Florachilena/ ... EH2106.htm

var. densilanatus, the name meaning densely woolly, is a hairier form. You will also find O. leucotrichus going around as O. hendricksenianus, but I believe O. leucotrichus is now considered the valid name with O. hendricksenianus consigned to synonymy.

https://www.cact.cz/noviny/2017/12/cereusy-08.htm

All the Oreocereus species can vary as to the amount of wool produced and spine colour can vary too.

[nona]

Yes O. leucotrichus is usually more yellowish spined.
…
All the Oreocereus species can vary as to the amount of wool produced and spine colour can vary too.

Thanks for the references and information. Can't say I've seen another O. Leucotrichus specimen since.
Here it's mostly O.Celsianus that's available followed by O.Trollii.

[DaveW]

There are a few Oreocereus Nona and the old genera Morawetzia and Arequipa are often sunk into Oreocereus now. See:-

https://cactiguide.com/cactus/?genus=oreocereus