Intergeneric hybrids are crosses of various genera which result in “designer” or “man-made” orchids. I have created this page because I have several orchids that fit this description.
The tag that came with one of these plants explains that it is a member of the “Oncidium Intergeneric/Alliance. That’s because there is Oncidium in the cross. The orchid in question is Dgmra. Winter Wonderland ‘White Fairy.’ It is a cross of Miltassia Cartagena and Odm. Gledhow. It is prolific and spectacular. It has the typical Oncidium pseudobulbs and leaves. They are mostly white with tiny purple highlights.
I have another Dgmra. (Degarmoara) and it is also a Dgmra. Winter Wonderland. This was obtained from a hobby grower at a local show rather than from a formal orchid business, so the label was hand-written and didn’t have any more specifics in terms of identification. It has a beautiful wine colored flower. Like the ‘White Fairy,’ it has the typical Oncidium pseudobulbs and leaves. It is also prolific. I have to repot this plant very regularly and separate large sections to repot individually. It throws off new pseudobulbs throughout the growing season. Like the ‘White Fairy’ it is very easy keeping.
I have one more Oncidium Intergeneric/Alliance orchid and it is a Zgd. Calico Gem “Green Valley #1.” Zgd. stands for Zeiglossoda and the Calico Gem is apparently a fairly well-known hybrid with a number of specific named crosses. The “Green Valley #1” is the one I own. It is more fragile than many of my orchids. It is less vigorous than many and I have to keep an eye on it. But when it flowers, the flowers are worth the effort. They are on the small side, are rather delicate, and not terribly short-lived. But very nice nevertheless.
Another more well-known combination is the Burrageara, which is a combination of Cochlioda, Miltonia, Odontoglossum and Oncidium (Cda. x Lilt. x Odm. x Onc.) Mine happens to be one of the lessor known but still readily available, Burr. Jumbo ‘Swarm.’ The predominant color in the flowers is almost chocolate. It grows long spikes, or racemes, that are covered with flowers. It is relatively easy to keep. It likes good light, but according to other posts, not direct sun. As with many of my high light plants that can’t handle really high light, I still keep mine on the bottom shelf of my three-tiered shelf unit in front of an east facing window. Because the only sun is morning sun, the lowest shelf is furthest from the window, and the lowest shelf is heavily filtered by the higher two shelves, they do very nicely here. Mine is throwing off its first raceme (I still call them flower “spikes!”) in late February.
Another beautiful intergeneric orchid hybrid is the Sophrolaeliocattleya. I have an Slc. Barefoot Mailman, which is an L. briefer x Slc Madge Fordyce. It has the appearance of the typical Cattleya with the thick upright leaves on stems emerging from a horizontal rhizome. Like many of the hybrids, this is a VERY sturdy, vigorous plant. It grows slowly but it’s built like a tank. Very solid pseudobulbs and stems and leaves. It is simply the picture of health. Very easy to keep happy. Like most of my orchids, twice-a-week watering and light fertilizing, high light, and lots of love!
Another intergeneric hybrid in my collection is the Brsdm, which is the abbreviation for Brassidium. This is a hybrid of Brassia (which adds a “spidery” influence to the flowers) and Oncidium, which adds vigor to the cross. This particular hybrid is the Brsdm Gilded Urchin ‘Ontario”. For whatever reason, at least mine is not as vigorous as many of my other hybrids. It is slower growing and seems to need a little more “babying” to stay healthy. But boy, does it flower! This is a horrible photograph with all the clutter in the background. But you get the idea of the gorgeous, spidery-yellow flowers in a long, graceful spray thrown off by this plant.
Because intergeneric orchids are by definition combinations of other orchids, their care can be more diverse than some genus’. However in my personal experience they all fall generally in the “middle-of-the-road” care – that is, they fit well in my regular care practices.
WATER: Water regularly. All of my intergeneric orchids are on my twice-weekly watering schedule and do not require any special water to do well.
LIGHT: I give my intergeneric orchids high light, but I’m careful as with all my orchids about direct sun. If they get direct sun, it’s through an Eastern facing window only so it is morning light, and it’s on a tiered rack where they can be rotated to lower levels if they show signs of too much light.
MEDIA: All my intergeneric orchids are repotted annually in coarse bark.
TEMPERATURE RANGE: Normal household temperature ranges. I can’t speak to the ability of this group to survive either extreme, but it does fine in our normal household range of low- to mid-60s as the winter lows and low- to mid-80s as the summer highs in the house.
CARE: Easy to care for. My typical care plan works well for all of my orchids in this grouping.
BLOOMING: Most bloom annually in the summer.
REPOTTING: Annually in coarse bark.