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As a comment about Hen and Chicks (Sempervivum 'Red Cobweb'), CDsSister wrote:

I could not find online or in our DB the cultivar" Xandra" but did find "Red Cobweb"

On the label it said Sempervivum arachnoldeum Xandra Hens and Chicks - Red Cobweb
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level Sempervivums
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valleylynn
Jun 24, 2013 12:07 AM CST
Here you go Marilyn, a link to Xandra. I also moved your photo to S.'Xandra'. : )
Hen and Chicks (Sempervivum 'Xandra')
[Last edited by valleylynn - Jun 24, 2013 11:26 AM (+)]
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Name: Marilyn
Greenwood Village, CO (Zone 5b)
Garden today. Clean next week.
Garden Procrastinator Region: Colorado Heucheras Region: Southwest Gardening Container Gardener Enjoys or suffers cold winters
Sempervivums Annuals Foliage Fan Herbs Garden Ideas: Level 2
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CDsSister
Jun 24, 2013 9:45 AM CST

Thanks, funny it does not look like Sandi's picture. Perhaps it did or will as it ages.
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level Sempervivums
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valleylynn
Jun 24, 2013 11:27 AM CST
Time of year and other growing conditions can make a big difference in how they look. I noticed Sandi's photo was taken in August, which would cause the leaves to close inward and develop more of the webbing. Lovey dubby
Name: Marilyn
Greenwood Village, CO (Zone 5b)
Garden today. Clean next week.
Garden Procrastinator Region: Colorado Heucheras Region: Southwest Gardening Container Gardener Enjoys or suffers cold winters
Sempervivums Annuals Foliage Fan Herbs Garden Ideas: Level 2
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CDsSister
Jun 24, 2013 4:38 PM CST

I will have to keep my eye on it then
Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level Sempervivums
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valleylynn
Jun 24, 2013 7:00 PM CST
Yes, good idea. Most of the webbed ones get heavier webbing in hot/dry conditions.
Name: Peter Dieckmann
Germany
Region: Europe Sempervivums Container Gardener Hibiscus Bee Lover Butterflies
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banker07
Sep 5, 2013 1:26 PM CST
I'm a little bit confused....

Red Cobweb isn't a name of a cultivar....it's only a discription of a red cobweb sempervivum;

who might be the breeder and who distribute semps with a name like that?!? but a lot of nurseries distribute No-Name-Semps and write a discription on the label; Whistling

so nobody can say if all that "red cobweb" plants are the same......

[url=www.sempervivum-liste.de]www.sempervivum-liste.de[/url]
[url=www.hauswurze.de]www.hauswurze.de[/url]
Name: Marilyn
Greenwood Village, CO (Zone 5b)
Garden today. Clean next week.
Garden Procrastinator Region: Colorado Heucheras Region: Southwest Gardening Container Gardener Enjoys or suffers cold winters
Sempervivums Annuals Foliage Fan Herbs Garden Ideas: Level 2
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CDsSister
Sep 5, 2013 3:58 PM CST
This is what the tag looks like. It is from Timberline Nurseries, in Arvada Colo. And is a very reputable dealer, don't know who the breeder is however.

To of my Arach mounding types are in trouble, Don't quite know what do to about it. Last year I had at least two others just melt away like this.


Thumb of 2013-09-05/CDsSister/9f4d0e Thumb of 2013-09-05/CDsSister/f23dde


Persephony seems to be holding it's own, although it does not have webbing right now.
Thumb of 2013-09-05/CDsSister/fce09c

Name: Peter Dieckmann
Germany
Region: Europe Sempervivums Container Gardener Hibiscus Bee Lover Butterflies
Dragonflies Birds Hummingbirder Frogs and Toads Dog Lover Cat Lover
Image
banker07
Sep 5, 2013 4:32 PM CST
there are a lot of serious nurseries with a lot of wrong plants.....

if you look at our database (I have no right to show the pictures here) you can see how the "real" Xandra has to look like:

http://www.sempervivum-liste.de/Sempervivum/Xandra

we have learned that there is no nursery without mistakes at the labels....

to rescue your poor plants you have to pull out the healthy ones, remove all try leaves and put them into fresh substrate; so they can bulid fresh roots and grow; it seems they even have no real good contact to the ground;

not every arachnoideum-cultivar has much web; even if the "sex-partner" is for exampel a tectorum ;-)

but Xandra has a lot of web!!

Persephony I don't know - never heard before; I can't say if it has to have web;
[url=www.sempervivum-liste.de]www.sempervivum-liste.de[/url]
[url=www.hauswurze.de]www.hauswurze.de[/url]
Name: Marilyn
Greenwood Village, CO (Zone 5b)
Garden today. Clean next week.
Garden Procrastinator Region: Colorado Heucheras Region: Southwest Gardening Container Gardener Enjoys or suffers cold winters
Sempervivums Annuals Foliage Fan Herbs Garden Ideas: Level 2
Image
CDsSister
Sep 5, 2013 5:49 PM CST
I can see why you say this is not the same, but this is what it looked like when I got it. Lightly webbed then

Thumb of 2013-09-05/CDsSister/34b508

Name: Lynn
Dallas, OR (Zone 8b)
Charter ATP Member Garden Sages I helped plan and beta test the plant database. I helped beta test the Garden Planting Calendar I was one of the first 300 contributors to the plant database! Plant Database Moderator
Forum moderator I helped beta test the first seed swap Celebrating Gardening: 2015 Plant and/or Seed Trader Garden Ideas: Master Level Sempervivums
Image
valleylynn
Sep 5, 2013 7:12 PM CST
And here it is with a bit more webbing. Marilyn, looking at the tag for your Xandra, it not giving a name of S. 'Red Cobweb', but just a description of the leaves being red at some time during the year. Just like one of the photos in Peter's link above.


Marilyn's growing conditions are quite unique from many of our growing conditions. She is at a very high altitude with extremes in weather year round, with very intense sun during the winter.

Chris's conditions a very different from Marilyn's. The two photos are just 2 weeks difference in time.


If happy and healthy this is what it can look like in Marilyns growing area of Denver, CO.
This is Sandi's photo.

In my area it looks more like yours Peter, I think our weather conditions are very similar.

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