Olympus UK E-System User Group
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Foto Fair Post your photos for friendly, non-critical feedback. This is the place to show pictures if you aren't yet ready for full-blooded critique, or simply want to share an interesting picture with other e-group visitors.

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Harold Gough Harold Gough is offline
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What Are These?

Let's see what suggestions we get.

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Imageryone Imageryone is offline
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Re: What Are These?

Crassula ?
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Harold Gough Harold Gough is offline
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Re: What Are These?

Mammillaria bertholdii (aka what are these?)

This is one of the extreme forms of pectinate (comb-like) spines on a cactus I have seen, The model:

https://cdn0.rubylane.com/shops/8574...8-01.1L.jpg?14 (Copy and paste to avoid copyright issues).

I refer to the size of them, as well as the way they are held away from the stem on such long tubercule:

http://www.microscopy-uk.org.uk/mag/.../bj-cacti.html

The flowers are borne at the bases of the tubercules, not on their tips. What looks like pollen is something else, fine wooly material of plant origin.

This is a cactus with pectinate spines on the areoles:

https://en.wikipedia.org/wiki/Areole

http://www.llifle.com/Encyclopedia/C...ria_bertholdii

Mammillaria bertholdii is new species described by Thomas Linzen in 2014:

http://mammillaria.forumotion.net/t2...ldii-spec-nova

I obtained the plant this week. It is finger-tip size, grown as a graft, which accelerates the growth, perhaps exaggerating the spread of the tubercules.

A radio news item yesterday said that succulents are becoming very fashionable in Europe, with growers struggling to meet the demand. Cacti are in the family Cactaceae, whereas other succulents occur in numerous plant families. There is no such thing as “a cacti”, a term used by the uniformed, not only for “a cactus”, the correct form (you wouldn’t say “a mice” would you?), but also to any succulent.

Olympus EM-1, Oshiro 2:1 60mm macro, triple TTL off-camera flash.

The stereos are crosseye.

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