As stated by ES, a particular hybrid can be difficult to find a few years later. A particular cultivar (clone) such as "Scent of a Woman" even harder. Orchids aren't "manufactured". Here, first a hybridizer has to make the particular cross Ruffles. It is a primary hybrid, both parents are species. (Onc. sotoanum x Onc. fuscatum). From a particular crossing of these two species, there may have been one plant (out of potentially hundreds) that was particularly good, and it was cloned. So there was a finite number of cloned plants. Unless there was a lot of market demand, no incentive to clone it again. When they're gone they're gone. If someone wanted to make this hybrid again (same parent species, but different plants or could be the same ones) , there could be another source of Onc. Ruffles, not that particular clone though. And again, a big "if". Usually hybridizers move on, making different hybrids rather than repeating the same one.
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