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Onc. Mendenhall Hildos ID ?

This is a discussion on Onc. Mendenhall Hildos ID ? within the General Orchid Culture forums, part of the Orchid Culture category; Does anyone have a picture of an Onc. Mendenhall Hildos plant? The one picture I ...

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  1. #1
    Mark V's Avatar
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    Default Onc. Mendenhall Hildos ID ?

    Does anyone have a picture of an Onc. Mendenhall Hildos plant? The one picture I can find on line doesn't look like the plant I bought that is labeled that way.This is what mine looks like
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    I got one Mendenhall Hildos, the plant looks just like yours.

    Qing

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    Mark V's Avatar
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    Quote Originally Posted by jtlqh View Post
    I got one Mendenhall Hildos, the plant looks just like yours.

    Qing
    Good enough. Thanks.

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    well, it's definitely a Psychopsis (formerly Onc.), and most have those maroon mottled leaves. Until it blooms it would be hard to be certain of the exact name. I had an earlier post that compared two Psys in bloom, and the differences are not that easy to spot, especially if you only have photos from which to identify the plant.

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    I work with the theory that the tag almost always has some truth in it. Punctuation can screw up the proper ID easily, or words can be misspelled or left out. But I wouldn't question a tag unless you had good reason to.

    Likewise, that's why I don't create tags for NOIDS unless I'm certain what it is.

    Julie

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    I don't know enough about these psychoses, er, psychopsis to say whether or not certain cultivars have distinctive leaf patterns...but for paphs, it definitely holds true. for example, Maudiae 'The Queen' has very distinctive foliage and you can almost always tell if a plant out of bloom is the real deal or not. this holds true for many other mottled-leaf paphs as well.

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    I have psychopsis Mendenhall Hildos.Not in bloom but BS.They all look alike as far as I'm concerned -typical flower on wirey stem that keeps elongating ---never cut stem off until it absolutely is dead as this keeps blooming forever on the same stems.
    This is a pic of psych. papillio & as I said they really do look alike.

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    Mark, the former nomenclature was Oncidium papilio 'mendenhall'. It is now Psychopsis mendenhall 'hildos'. Youre going to be waiting a while for this one to bloom, no matter how excellent your growing may be - its just a slow bloomer. The spikes are very very slow.

    Anyway - the way you will be able to determine (when it blooms) that it is a 'hildos' (all the psychopsis plants look very similar, and the mottling of the leaves is just a reaction to light levels - any psychopsis variation can get that mottling. it doesnt tell you which variation it is, the blooms are the only real determinant) is by the lip and lateral sepals.

    Psychopsis flowers are very unusual in their structure.
    Name:  psychopsis_papillio.jpg
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    Name:  psych_mendenhall1_hildos.jpg
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    The labellum is obviously in the normal position, bottom center, but thats not the interesting part. Those two petals to the lateral positions are actually not petals. Those are the lateral sepals. The natural assumption is that the sepals are the thin spikes at the top, and the petals are the 3 showy portions. Its actually divided up. The center spike is a sepal, along with the lateral showy portions, and the lateral spikes, along, obviously, with the labellum, make up the petals.

    Anyway, im rambling. In our pictures, we first have the type species Psychopsis (formerly oncidium) papilio. Next we have Mendenhall 'hildos'.
    Whats the difference?

    1. The spikes are maroon in the papilio, purple in the hildos.
    2. papilio's spikes are taller and straighter, whereas 'hildos's are arched and shorter
    3. papilio's labellum's colors are very adverse - youve got red, and youve got yellow, no inbetween, and theyre completely separated. 'hildos' has more splashing of yellow around the fringe of the labellum.
    4. the barring on papilio's lateral sepals is distinct and clear, 'hildos' generally has split, staggered yellow bars.
    5. the biggest one - the labellum and lateral sepals of 'hildos' are twisted and gracefully droop, whereas papilio looks as if theyre being pulled to the sides - very straight and flat.
    6. the one less noticed - the fimbriation on the column - this is characteristic of mendenhall.
    Name:  psych_mendenhall2_lip.jpg
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    Sorry if i rambled, i love papilio. one of my favorite flowers. hope my information was helpful.

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    Ok, I'm going to put on my anal-retentive cap now and be a bit of a nomenclature stickler...

    Colin is correct that Psychopsis is the preferred genus name for these guys, rather than Oncidium, which was formerly used. But the exact naming change he suggested isn't quite right and leads to some confusion.

    The hybrid cross, Psychopsis Mendenhall, was registered in 1988 and is a cross between hybrid Pyp. Butterfly (itself being sanderae x papilio) and the species Pyp. papilio. Note that hybrid names are capitalized and species names are not. Pyp. Mendenhall the hybrid, won a FCC/AOS in 2004 and the cultivar name it was given was 'Hildos.' So its correct tag would be: Pyp. Mendenhall 'Hildos' FCC/AOS.

    The species Pyp. papilio also won an FCC/AOS in 1985 and the cultivar name it was givein was 'Mendenhall.' So that plant would read: Pyp. papilio 'Mendenhall' FCC/AOS. Very confusing, yet there it is.

    Mark, it sounds like your tag should be: Pyp. Mendenhall 'Hildos' FCC/AOS.

    Julie

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    Colin, Excellent explanation on how to differentiate the two psychosis!!!

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