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Name: Patty
Washington State (Zone 8b)
Celebrating Gardening: 2015
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Patty
Mar 21, 2013 9:10 PM CST
Basically, I guess I'm asking: if a botanist found a new plant in the wild what about the plant would define it as belonging to the arach group? (Assume no genetic test!). Flower color for one? I've seen plants with lots of webbing that seemed like they would be arach's but aren't... And if it's a cross with an arach and a non arach then is the new cross an arach or not? Who decides? Thanks for you experts out there!
Patty 🌺

Charter ATP Member I was one of the first 300 contributors to the plant database!
twitcher
Mar 21, 2013 10:45 PM CST
There are people that work in the field and journals that publish that kind of information. Part of the process would be a formal description of the plant and its location. If its a cross between and arach and a non arach, then your could call it an arach hybrid. Keep in mind that if it is a cross between an arach and another semp species, for example, S. montanum, then you could also call it a montanum hybrid.

At one point in the past, nomenclature rules permitted that assignment of new names to species crosses. I can't think of an example at the moment, but some of the names that were assigned to semps that look like species names are actually hybrids. Since semps have been cultivated by people for many years, it can be very difficult to know whether something is a hybrid or not, new or not, etc. Fortunately, records of a lot of this have been kept over the years, so there is some history for a lot of varieties.

I tried several times over the past few years to use the Internet to build just a list of species names. However, I have never been able to complete that project and eventually gave up. I suspect that much of the formal literature about semps is not in English. Lynn has compiled a list of informative links regarding semps. One such link refers to the Sempervivum Journal, which is a good place to start to learn about history and has a more scientific approach.
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
Mar 21, 2013 11:32 PM CST

Moderator

I agree
Name: Patty
Washington State (Zone 8b)
Celebrating Gardening: 2015
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Patty
Mar 22, 2013 8:32 PM CST
Thank you! I thought maybe there were some simple traits that defined the species but I can see it all gets pretty complicated!
Patty 🌺
Name: Arlene
Grantville, GA (Zone 8a)
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abhege
Mar 22, 2013 8:49 PM CST
I wonder if we can get a icon that symbolizes "over my head?" I bet it would be used a lot! Rolling on the floor laughing Rolling on the floor laughing
Name: Kate
S Wales UK (Zone 9a)
Region: Wales Region: United Kingdom Cat Lover Sempervivums Cactus and Succulents Container Gardener
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Eviesmummy
Mar 23, 2013 5:01 AM CST
Rolling on the floor laughing I agree Rolling on the floor laughing
Kate UK
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
Mar 23, 2013 8:34 AM CST

Moderator

Arachnoideum species can have different color blooms, depending on the species. An arach has webbing, lite to heavy depending on the species or time of year.
Summer usually brings on the heaviest webbing. Webbing is not to be confused with cilia.
Cilia


Webbing
Name: Bev
Salem OR (Zone 8a)
Sempervivums Container Gardener Foliage Fan Garden Ideas: Master Level Photo Contest Winner: 2014
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webesemps
Mar 23, 2013 8:58 AM CST
Nice examples to illustrate the distinction. Thanks Lynn.
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
Mar 23, 2013 9:01 AM CST

Moderator

The Boule de Neige is a photo belonging to Perennial Obsession. They let me use their website photos for the database.
Name: Bev
Salem OR (Zone 8a)
Sempervivums Container Gardener Foliage Fan Garden Ideas: Master Level Photo Contest Winner: 2014
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webesemps
Mar 23, 2013 9:04 AM CST
For a minute,Lynn, I thought you had some...
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
Mar 23, 2013 9:07 AM CST

Moderator

I do, but it is just a baby and I haven't taken any photos yet.
Name: Clint Brown
Medina, TN (Zone 7b)
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clintbrown
Mar 23, 2013 11:03 PM CST
Lynn - Does Sempervivum 'Boule de Neige' look like that most of the time? I want that one! I got some offsets of one called 'Cobweb' today!
Name: Patty
Washington State (Zone 8b)
Celebrating Gardening: 2015
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Patty
Mar 24, 2013 12:07 AM CST
Hurray! I got a hands on demo today and learned a lot! Lynn's a fantastic teacher! Hurray!
Patty 🌺
Name: tarev
San Joaquin County, CA (Zone 9b)
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tarev
Mar 24, 2013 12:25 AM CST
Hello there! I just got my very first Sempervivum today..and glad to see it has a thread here already..so just sharing the photo of my new acquisition Big Grin

Thumb of 2013-03-24/tarev/3cf977
Name: Greg Colucci
Seattle WA (Zone 8b)
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gg5
Mar 24, 2013 12:40 AM CST
Congrats Tarev, is it just arachnoideum or something else? How cute!
Lynn, you say that arachs can have different flower colors? Don't all semps have the same flower color (pink) and Jovis (white) ?? I don't know why I thought that, feel like I read that somewhere. Please let me know so I can get rid of this misinformation (if its incorrect)
Thanks all
I tip my hat to you.
Plants bring me peace and calm, more of what we all need Smiling
Name: tarev
San Joaquin County, CA (Zone 9b)
Always count your blessings in life
Region: California Houseplants Plays in the sandbox Orchids Plant Lover: Loves 'em all! Composter
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tarev
Mar 24, 2013 12:51 AM CST
Hi Greg..the tag says Sempervivum arachnoideum and nothing follows after it other than the rest of the care label.. Smiling the webbing sure makes it so cute.
Name: Chris
Ripon, Wisconsin
Charter ATP Member I was one of the first 300 contributors to the plant database! Garden Sages Forum moderator Garden Ideas: Master Level Plant Database Moderator
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goldfinch4
Mar 24, 2013 4:30 AM CST

Moderator

Congratulations on your new purchase Tarev! That is a full pot. May it be the first of hundreds of semps you get. Sticking tongue out

Greg, not all semps have pink flowers. There are many shades of pink, but they can also be almost red, pale green or yellow, or white.
Cubits Store: The Sempervivum Patch - plants, containers, accessories!
Also stop by Timber Treasures and Garden Buddies on Cubits
Name: Kate
S Wales UK (Zone 9a)
Region: Wales Region: United Kingdom Cat Lover Sempervivums Cactus and Succulents Container Gardener
Region: Europe Butterflies Roses
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Eviesmummy
Mar 24, 2013 5:50 AM CST
Hi Tarev, what a cute semp! Take care hanging out with this crowd - I only joined ATP in Febuary to get some info on growing sempervivum from seed. Now I have a yard full of semps, not counting the seedlings Rolling on the floor laughing
Kate UK
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
Mar 24, 2013 8:00 AM CST

Moderator

Nice arach Tarev. And I see tiny offsets shooting out from some of the rosettes. That is one heavy producing semp.
So what is going to me your next sempervivum? Whistling

Clint this will be my first year with 'Boule de Niege'. It has been under cover all winter so has very heavy webbing right now, but in my experience with the many arach types I have, winter/spring rainy season causes them to have little or now webbing. Once summer heat and no rain arrives they for lots of webbing.

Greg here you will find out about the bloom colors in semps and jovis. Just under the first set of photos. http://garden.org/ideas/view/valleylynn/1230/Sempervivum-101...
Name: tarev
San Joaquin County, CA (Zone 9b)
Always count your blessings in life
Region: California Houseplants Plays in the sandbox Orchids Plant Lover: Loves 'em all! Composter
Cactus and Succulents Dragonflies Hummingbirder Amaryllis Container Gardener Xeriscape
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tarev
Mar 24, 2013 10:06 AM CST
Thanks everyone!
Ah..my next semp will be..in a while Big Grin my hubby might hit the roof, since I got other succulents home with me yesterday..got to keep it a low profile Hilarious! Hilarious!

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