Hey Everyone,
I've been trying to identify a few cacti I have and stumbled onto this awesome website. I've had this Mammilaria sp for almost two years and never knew its true identity. It's about 3.5" (9cm) tall and 2.75" (7cm) wide. I'm newly Cacti obsessed, but I believe it to be a M. hahniana or M. albinata (or something else entirely). The spine number and color seem to match M. hahniana, but there seem to be subtle differences in the pistil color between this cactus and pictures I've seen of M. hahniana online. It also doesn't seem quite as hairy, maybe environmental? I'm not sure if that's identifiable or just variation seen within a specie. I've attached pictures of the flowers, top view and a close up of the spines for reference. It's young so I may just need to be patient, but any guidance would be much appreciated, thank you!
Any help appreciated, Mammillaria sp.
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ColdCacti603
- Posts: 3
- Joined: Tue Apr 26, 2022 11:21 pm
- Location: New Hampshire USDA Zone 5b
Any help appreciated, Mammillaria sp.
- Attachments
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- Ring of flowers around the crown of the plant
- m_sp_side_cg.jpg (148.19 KiB) Viewed 514 times
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- m_sp_top_cg.jpg (185.66 KiB) Viewed 514 times
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- m_sp_spine_cg.jpg (201.91 KiB) Viewed 514 times
Re: Any help appreciated, Mammillaria sp.
M. woodsii, perhaps?
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greenknight
- Posts: 4819
- Joined: Tue Apr 30, 2013 4:18 am
- Location: SW Washington State zone 8b
Re: Any help appreciated, Mammillaria sp.
I was thinking M. hahniana. Never heard of M. woodsii, so I searched and learned that it's now considered a subspecies of hahniana - so I guess I agree.
Spence 
Re: Any help appreciated, Mammillaria sp.
Yes there are a few forms in the M. hahniana group, mainly varying according to the amount of hair produced. Whether you keep them as separate species or just reduced to varieties is a matter of opinion. There were two good Mammllaria's of the Month articles covering them here:-
http://mammillaria.net/oldweb/mammofmonth-Sep08.htm
http://mammillaria.net/oldweb/mammofmonth-Oct08.htm
http://mammillaria.net/oldweb/mammofmonth-Sep08.htm
http://mammillaria.net/oldweb/mammofmonth-Oct08.htm
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ColdCacti603
- Posts: 3
- Joined: Tue Apr 26, 2022 11:21 pm
- Location: New Hampshire USDA Zone 5b
Re: Any help appreciated, Mammillaria sp.
Thank you all! It's all so fascinating
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greenknight
- Posts: 4819
- Joined: Tue Apr 30, 2013 4:18 am
- Location: SW Washington State zone 8b
Re: Any help appreciated, Mammillaria sp.
Oh, and in answer to your second question - given lots of sun it should get more woolly, but it's clearly not one of the very hairy strains of hahniana. As Dave's links illustrate, it's a pretty variable group.
Spence
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ColdCacti603
- Posts: 3
- Joined: Tue Apr 26, 2022 11:21 pm
- Location: New Hampshire USDA Zone 5b
Re: Any help appreciated, Mammillaria sp.
Good to know, thank you!greenknight wrote: ↑Thu May 05, 2022 6:49 am Oh, and in answer to your second question - given lots of sun it should get more woolly, but it's clearly not one of the very hairy strains of hahniana. As Dave's links illustrate, it's a pretty variable group.