Rock Stonecrop (Sedum forsterianum)

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AnalogDog Mountlake Terrace, WA(Zone 8a) May 31, 2008

Rock Stonecrop
Sedum forsterianum

S. fosterianium forma cristata side view

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Post #5029428
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Joan Belfield, ND(Zone 4a) Jun 08, 2008

Hi Analogdog,

Could these photos possibly be misplaced, or the plant misnamed? I can find no reference to Sedum fosterianum f. cristata, and the plant in both this photo and this one http://davesgarden.com/guides/pf/showimage/197296/ don't appear to look like any Sedum fosterianum photos that I can find.

Please let me know what you think and if you can provide some links that verify the plants identity, that would be very helpful.

Joan

Post #5070816
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AnalogDog Mountlake Terrace, WA(Zone 8a) Jun 08, 2008

Yes, it is a quite new form of S. fosterianum. I can understand your confusion, as I was similarly confused when dealing with this plant.

The plant is propogated, and named by a Sedum Wholesaler in Washington state. I believe that this person is the first to have sedums become crested. He is the owner of the Sedum Photos web site found at www.sedumphotos.net. I suggest you further this discussion with him, as I am only using the ID from his tags on my plants.

Post #5070985
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Joan Belfield, ND(Zone 4a) Jun 08, 2008

Thanks! I've written to Wayne at that site. Hopefully he will be able to help us sort this out.

Post #5072523
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Joan Belfield, ND(Zone 4a) Jun 09, 2008

I heard back from Wayne and he doesn't think it's a forma or a cultivar, but perhaps it's a sport. He suggested I contact Ray Stephenson, the author of 'SEDUM Cultivated Stonecrops'. I have his book, but this plant is not in it. I have an email in to Ray, so hopefully we will find out the true history behind this plant soon. :)

Post #5074370
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AnalogDog Mountlake Terrace, WA(Zone 8a) Jun 09, 2008

Forma refers to the shape or appearance of a plant. So to call it forma cristata, means "crested form", nothing more, nothing less.

The plant is very obviously crested, as some sedums can be.

It may be that you are unfamiliar with crested forms of plants. Cresting happens when the apical meristem of a plant becomes a linear object rather than the point that it normally is. Cresting is common in the Cactus and Succulent world.

I know nothing about how cresting is induced (if it is), propigated, or otherwise. But it is something that happens to plants from time to time. I have seen it in many flowers, where the flower appears to be folded with a slightly bizarre look.

For more on cresting, see http://www.arhomeandgarden.org/plantoftheweek/articles/fasciated_2-22-08.htm

Rob

Post #5074948
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