Crassula arborescens ssp. undulatifolia
KRASS-oo-la ar-bo-RES-senz un-dew-lay-tih-FOH-lee-uh
INCORRECTLY MARKETED AS:
Crassula ovata undulata ‘Jitters’
Synonyms of Crassula arborescens (7) (Updated on 1-18-21): Cotyledon arborescens Mill., Cotyledon punctata Lam., Crassula arborea Medik., Crassula cotyledon Jacq., Crassula cotyledonifolia Salisb., Sedum arborescens (Mill.) Kuntze, Toelkenia arborescens (Mill.) P.V.Heath
Crassula arborescens (Mill.) Willd. is the correct and accepted scientific name for this species. It was first described as such by Carl Ludwig Willdenow in Species Plantarum, 4th Edition, in 1798. It was first described as Cotyledon arborescens by Philip Miller in Gardener’s Dictionary, 8th Edition, in 1768.
Crassula arborescens subsp. undulatifolia Toelken is an approved infraspecific taxon of Crassula arborescens. It was named and first described by Hellmut R. Toelken in the Journal of South African Botany in 1975. There were two accepted infraspecific names not this is the only one listed as of the last update of this page on 1-18-21.
The genus, Crassula L., was named and described as such by Carl von Linnaeus in the first volume of the first edition of Species Plantarum in 1753.
Plants of the World Online by Kew lists 205 species in the Crassula genus (as of 1-18-21 when I am updating this page. It is a member of the plant family Crassulaceae with 36 genera. Those numbers could change as updates are made.
THERE ARE SEVERAL LINKS AT THE BOTTOM OF THE PAGE FOR FURTHER READING.
This is another succulent that was given to me by the owner of Pleasant Acres Nursery in Leland, Mississippi in May 2012. The label said Crassula ovata undulata ‘Jitters’ which I found out was incorrect. Margrit Bischofberger of the International Crassulaceae website corrected the name as Crassula arborescens ssp. undulatifolia. The common name for this plant is Ripple Jade. I think the common name for Crassula arborescens could be Silver Dollar Plant and Silver Jade Plant.
There were two accepted infraspecific names of Crassula arborescens, but Plants of the World Online by Kew only list Crassula arborescens subsp. undulatifolia as being accepted. It is found in the southern parts of the Klein Winterhoek Mountains of the Eastern Cape in Africa. It is actually described as a succulent tree with blue-grey foliage with a thick fleshy trunk. The leaves are somewhat twisted looking. This plant, in the wild, can grow to a height of around 9′ tall. Plants typically grow in sandstone and shale-derived soils in rocky to gravel-like conditions. They often occupy large areas on hills, slopes, and sometimes cliffs but are also found in valleys but with a preference for sunny and exposed situations.
This WAS a neat plant… Shortly after I brought it home, it got a bad infestation of brown scale. I picked them off for a while but finally had to go to Lowe’s and buy a GardenSafe insecticide/fungicide/miticide. The product was OMRI approved and didn’t have a lot of harsh chemicals. It worked pretty well. I later went out to the nursery to take some plants and told her about the brown scale. She said she hadn’t noticed, so I went to check hers. They were LOADED and dying.
Origin: Eastern Cape in South Africa
Zones: USDA Zones 9-11 (20-30° F)
Size: 3-4’ tall x 2-3’ wide
Light: Sun to part shade
Soil: Very well-draining. Good quality potting soil amended pumice (50/50) or additional perlite and chicken grit (2-1-1).
Water: Average water during the growing period, slight in winter.
Propagation: Stem cuttings
Uses: Used as a houseplant where not hardy
Concerns: Brown scale and mealybugs
I moved from Mississippi back to the family farm in mid-Missouri in February 2013 and I brought this plant with me. I ran out of the spray and went to the local hardware store… They didn’t have anything organic, and what they had smelled like alcohol. Well, I bought it anyway. Within a few days My Crassula arborescens ssp. undulatifolia was DEAD!
Maybe someday I will find another and hopefully, it won’t have an infestation of brown scale.
Just remember, Crassula arborescens subsp. undulatifolia is a SUBSPECIES not a VARIETY (VAR.) and Crassula ovata var. undulatifolia is an incorrect name.
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.