Mammillaria marcosii?

[MagiCarpus]

Hi all, It's been a few weeks since my last post here. it's just that here in Canada, nothing is worth sharing at this season. I do have a plant I'd like to be identified, herd it is. I suspected this might be a Manmillaria marcosii. Thanks!

[jfabiao]

It's not a Mammillaria. It's still too young to tell, but it maybe a Thelocactus or a Ferocactus hamatacanthus. By this time next year you'll know.

[adetheproducer]

I was thinking somethung like thelocactus bicolour.

[DaveW]

Agreed, not a Mammillaria, though easy to see how you confused it with some forms of M. marcosii. Mammillaria marcosi usually comes in at least two distinct spine coloured forms, the more common brown spined in the UK and a yellow spined form. Though they look rather different they are all the same species

http://www.cactus-art.biz/schede/MAMMIL ... rcosii.htm

http://www.cactus-art.biz/schede/MAMMIL ... spines.htm

http://mammillaria.forumotion.net/t1216 ... a-marcosii

[MagiCarpus]

Thanks all!
I wonder, what was the telltale sign that indicated otherwise? was it that lack of areoles at the bases of tubercles? (both apical and basal areoles have to be present for a mamm?)

[greenknight]

The lack of wool in the axils is definitely part of it, M.marcosii should have that.

[vlani]

Fero setispinus ? (same as hamatocanthus)

[Nic]

I say its the fero, I have one a little larger and its developing hooked spines.