Orange Stonecrop, Russian Stonecrop
BACK AND FORTH from Phedimus to Sedum and Sedum to Phedimus how many times? I am not sure how many times when updating this page the name has switched and it may continue to do so. Last time I updated it was a Sedum species and this time, on January 4, 2019, Plants of the World Online says Phedimus kamtschaticus is the accepted name… SO, I had to move things around a bit on this page AGAIN…
Synonyms of Phedimus kamtschaticus: Aizopsis florifera (Praeger) P.V.Heath, Aizopsis kurilensis (Vorosch.) S.B.Gontch., Aizopsis takesimensis (Nakai) P.V.Heath, Phedimus florifer (Praeger) ‘t Hart, Phedimus takesimensis (Nakai) ‘t Hart, Sedum floriferum Praeger, Sedum kamtschaticum Fisch., Sedum kurilense Vorosch., Sedum sikokianum subsp. kurilense (Vorosch.) Vorosch., Sedum takesimense Naka
Phedimus kamtschaticus (Fisch.) ’t Hart was described by Henk ’t Hart and Urs Eggli in Evolution and Systematics of the Crassulaceae in 1995.
Sedum kamtschaticum Fisch. & C.A.Mey. was named and described by Friedrich Ernst Ludwig von (Fedor Bogdanovic) Fischer and Carl Anton (Andreevič) Meyer in Index Seminum in 1841. Plants of the World Online by Kew lists 10 synonyms of Sedum kamtschaticum.
The genus, Phedimus Raf., was named and described by Constantine Samuel Rafinesque in the American Monthly Magazine and Critical Review in 1817. According to Plants of the World Online, there are currently 14 accepted species in the Phedimus genus (as of 1-4-20 when I am updating this page).
The genus, Sedum L., was named and described as such by Carl von Linnaeus in the first edition of Species Plantarum in 1753. Plants of the World Online currently list 456 accepted species when I am updating this page on 1-4-20. There were 550 accepted species when I last updated on June 8, 2019, when I am updating this page. Version 1.1 of The Plant List (not maintained since 2013) listed 392 accepted species plus 29 infraspecific names, a total of 655 synonyms, and 429 names yet to be assessed. The number of accepted species will continue to change. There are other databases but I think Plants of the World Online by Kew is the most up-to-date.
I had been in correspondence with one of the foremost Crassulaceae experts, Margrit Bischofberger of the International Crassulaceae Network, and she had this to say in an email in 2013…
“For the plant now called Phedimus kamtschaticus :
It has been described as a Sedum species in 1841 and has been considered a Sedum species for a very long time. The genus Sedum in a wide sense has been used to accommodate a great number of sometimes fairly diverse plants. At the end of the last century botanists have begun to separate certain groups with distinctive features and give them new names, > Phedimus, > Hylotelephium, < Rhodiola, > Orostachys etc.
So now the correct name of a group of plants with flat leaves which are often serrate or dentate is Phedimus. That means it is the other way round: The accepted name is Phedimus kamtschaticus and the earlier name S. kamtschaticum is a synonym.”
In an email from the Senior Content Editor of Kew on August 23 (2018), he said: “As to Sedum, POWO still takes a wide view of the genus because there is not yet an agreed system to deal with it. Most of the research has been done in Europe on European species for which a number of genera have been made but it is unclear how they relate to the Asian and American species. So until this is settled we will retain a large Sedum.”
It will be interesting to see how this plays out…
If you don’t mind, I am keeping both names on the captions… The next time I update, Phedimus may be a synonym again.
Apparently, I bought this plant from Mast’s Greenhouse on May 16, 2016, when I was temporarily without a camera. I took a photo of it with my computer and that’s when it is dated. I bought quite a few plants while I was there that were unlabeled which can be a problem when buying from Amish greenhouses (at least for me). I took all their photos with my computer that I can barely make out, and to this day I am scratching my head as to what some of the plants were and even what became of them… Finally, I did get another camera on July 19.
Anyway, no matter what you call it, this plant is AWESOME! It doesn’t matter what us humans call it, it knows who it is and I think it is keeping it a secret.
Origin: Japan, Kamchatka, Kuril Island…
Zones: USDA Zones 4a-9b (-30 to 25° F)
Size: 6-8” tall or more. Larger if it is a… You know what I mean.
Light: Sun to part shade
Water: Average water needs. Drought tolerant.
As with all Sedum, if they are grown in the ground they need very well-draining soil. They aren’t so much particular about the soil type as the need for it to be well-drained. My Sedum kamtschaticum, or whatever you call it, is growing on the second level of a raised bed and it does great. They make good container plants and a few Sedum species do well inside for the winter.
They are drought tolerant although they appreciate regular watering during the heat of summer when it doesn’t rain that much.
They will do well in the sun to light shade. In some parts of the country, they may do best in light shade where the heat gets very intense. Although my Sedum kamtschaticum is growing where it “could” get full sun all summer, in years past it was partially shaded by the Marigold ‘Brocade’ on the lower level of the bed and the Celosia argentea var. spicata ‘Cramer’s Amazon’ on the upper level. Sometimes if I am not paying attention, it would almost get covered up. I have to do something about that for 2018.
January 2018 came in cold and hard with several days well below zero. If there was ever a test for plant hardiness this would have been it. The Sedum kamtschaticum made it through with flying colors. One thing is for sure if this plant is the subspecies Sedum kamtschaticum subsp. ellacombeanum, changing it to Phedimus aizoon would be much easier to spell.
Well, 2018 is here and this plant has survived the winter and is getting off to a good start.
In the summer of 2018, I did not have the Celosia on the upper level of the bed nor the Marigolds in the bottom level. So, the Sedum kamtschaticum was in full, intense sun.
The Sedum kamtschaticum was still doing well and looking good on April 13 when the above photo was taken.
I am kind of running out of words…
It is always good to see this Sedum start to flower.
This is the first year my Sedum kamtschaticum has sprawled out like this. It normally more upright. The only difference is that it doesn’t have other plants growing around it.
Maybe it felt like it had the freedom to spread out a little.
The Sedum kamtschaticum is beginning to grow after its winters rest. It is still a little blushed from the cool temps. This winter wasn’t as cold as last year, though.
This Sedum sprawled somewhat last summer and the stems that were touching the ground have taken root.
Looking pretty good on April 7.
The Sedum kamtschaticum is well underway for a new summer.
I’m running out of words again…
You know who is beginning to bud…
Starting to flower well and sprawl a little leaving an open hole in the middle of the clump…
This clump flowered well again in the summer of 2019 then afterward started sprawling again. Strange how it has only done that the past couple of summers…
I have no doubt it will survive the winter again and I will continue to take more photos…
I hope you enjoyed this page and maybe found it useful. If you have any comments, questions or suggestions, I would like to hear from you. Please click on “like” if you visited this page. It helps us bloggers stay motivated. 🙂 You can check out the links below for further reading. The links take you directly to the genus and species of this plant.