Aerangis hildebrandtii

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.

 

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).

 

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