Lophophora jourdaniana Habermann
Pic: Peter A. Manfeld
The origin of this variety is unkown but it is very likely that it is a nursery produced hybrid. Maybe a hybrid between Lophophora Williamsii and Lophophora diffusa var. fricii. No matter what, it´s definitely a species or variety that is genetically close to Lophophora diffusa.
Some people regard Lophophora williamsii var. Jourdania as a separate species and it depends on the taxonomic system that you use to classify them. In my opinion, the whole genus Lophophora is very variable and I dont think the plant should be regarded as a seperate species because traits like flower color can change dramatically within just one generation. I believe that this is a nursery produced hybrid and if you create a hybrid by crossing two plants, the resulting F1 outcome should not be regarded as a new species. There are countless natural hybrids and despite the fact that the offspring might look a bit different from the parents, it´s still a hybrid. In this case, Lophophora fricii was most likely the mother.
Some people mentioned that Lophophora Jourdaniana does not accept the pollen of other Lophophora´s. That being said, I heard that there are some Lophophora Jordaniana that in fact DO accept pollen from other Lophophora´s and I guess it has to do with the fact that Lophophora is mostly available as a cultivar/clone, which dramatically reduces the genetic health and sometimes even leads to a plant not being able to reproduce. But no matter what you believe Lophophora Jourdaniana to be, it definitely is a very interesting plant.
Some people even believe that it is a intergeneric hybrid between Lophophora and Turbinicarpus or Lophophora x Mammillaria. Well, who knows and sometimes, a grower succeeds in making a weird cross, just like the German grower Graeser, who once crossed Trichocereus Candicans and an Aporocactus. Again, the taxonomy of this plant is highly debatable and I dont want to blow in the same horn as many other people who constantly want to change the taxonmic ID of a plant. But just because you are not able to cross one specimen of Lophophora Williamsii and Lophophora Jourdanium with each other, it doesnt mean it´s not possible.
Description: Typical Lophophora, small clumping cactus with a big root. The biggest part of this plant grows underground and it forms clumps that can reach 18 centimeters in diameter.
Color: The color looks darker than what you see on most Lophophora Williamsii. Overall, this type has a very healthy, dark green color while most Lophophora Williamsii´s are gray to blue.
Ribs: Wavy, flattened ribs, similar to what we know from Lophophora diffusa. 4-14 Ribs.
Areoles: With small tufts of very short hairs.
Spines: This is one of the very few Lophophora´s that actually produce spines. They are very small and only up to 1,2 centimeters long.
Flower: Violet or dark pink color. The flower on Lophophora Jourdaniana loos more like the one that can be found on Lophophora fricii, which I regard as a subsecies of Lophophora diffusa. 2-5 centimeters in diameter.
Again, nobody knows where this plant came from but the fact that it wasn´t found in the wild underlines that it might be a hybrid. A very interesting fact is that this species/variety does have spines; which is very rare for Lophophora´s and as far as I know, only occurs on Lophophora Jourdaniana.
Lophophora Jourdaniana is self-sterile, which means it needs a pollen donor to get seeds. Seed grown Lophophora Jourdaniana are said to be viable pollen donors.
Cultivation: Since this is a very slow growing cactus, it is similarly vulnerable for rot than other Lophophoras. It´s best to graft it very early on if you want to get the best growth rate. If you want your plants to remain natural, you can certainly grow it on it´s own roots but make sure to use a substrate with sufficient drainage. The plant does not like to be exposed to full sun and is best grown at a shady place that sometimes get´s a fair amount of sunlight.
Don´t water them too much if the weather is not hot because that might cause rot or elongation. Only water them when it´s hot and make sure to not soak it for prolonged periods of time. Sometimes if watered too heavily, the plant can also „explode“ after receiving too much water.
Winter treatment: Needs a bright place that is constantly at a termperature around 10 degree celsius. This plant can take very short frosts but the overall temperature should not be colder than -6 celsius if you want your plant to survive. The plants need to be completely dry in winter and require fresh air every now and then.
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