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Aerangis hildebrandtii

Discussion in 'Orchid Species' started by naoki, Apr 20, 2019.

  1. naoki

    naoki Well-Known Member

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    I got this from Andy's Orchids a couple years ago. I was curious about the difference between this and A. hariotiana. So I decided to look into the original description (my attempt of translation is included in my Orchid Borealis blog post). But it didn't yield any useful info for the distinction. But through the process, I found PDF of this book (A Primer of Botanical Latin with Vocabulary), and reading it for two days dramatically improved my understanding of Latin (link). I've never learned Latin before, but I might try to learn a little more.

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  2. Chuck-NH

    Chuck-NH Well-Known Member

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    Thanks Naoki...liked reading your blog post about this as well.
     
  3. DanaRaluca

    DanaRaluca Active Member

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    This is cute! It looks like the plant is wearing some colorful strings of pearls
     
  4. DPfarr

    DPfarr Well-Known Member

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    I made a mnemonic to tell the difference.

    Aerangis hariotiana has an “o” so corresponds to ovate leaves.

    Aerangis hildebrandtii has an “l” and leaves has lanceolate.
     
  5. naoki

    naoki Well-Known Member

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    Thanks, Daniel. I looked around photos on internet, but I haven't seen any plants with lanceolate (i.e. with a pointy tip). Also this article (PDF) seems to suggest that their plants (I assume both species) don't have lanceolate leaves.

    Reichenbach used the word "lingulate unequally bilobed leaves" With "lingulate" (tongue shaped), I imagine a rounded tip (am I wrong?). However, he also described sepals and petals, which have pointy tips, are lingulate, so it is pretty confusing. Kraezlin described the leaf: "foliis oblongis apice bilobis, apicibus non divergentibus obtusis" (oblong leaves with the bilobbed apex and the tips of the lobes are not diverged and obtuse).
     
  6. DPfarr

    DPfarr Well-Known Member

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    It’s not an exact mnemonic, but I’ve dealt with hundreds of each as the grower for Gold Country Orchids, so it was the one I invented for myself to quickly distinguish which species I was dealing with for orders, shows, etc.
     
  7. naoki

    naoki Well-Known Member

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    Very interesting, so you have seen some plants with different leaf shapes. From the photos of plants labelled as A. hildebrandtii, I can't see that the leaf shapes are different. I guess it is probably something you have to compare side-by-side (as Gilles mentioned about the flower size).

    Here is Gilles' old post where two species are compared (unfortunately the link to the flower size comparison is gone):
    2 Microterangis

    And a couple more:
    Microterangis hildebrandtii
    Chamaeangeris hildebrandtii
     
  8. Mikhail kujawa

    Mikhail kujawa Well-Known Member

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    Nicely bloomed!
     
  9. DPfarr

    DPfarr Well-Known Member

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    I forget which one has greater flower spacing, but that’s supposed to be another factor in keying these two. Mine are on track to be blooming at the same time very soon. I’ll try to remember to get some dissection scope comparison pictures.
     
    naoki likes this.