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OrchidPrasophyllum tadgellianum

1 Tadgell's leek orchid at Kosciuszko National Park

4 images

Prasophyllum tadgellianum at Kosciuszko National Park - 3 Jan 2019
Prasophyllum tadgellianum at Kosciuszko National Park - 3 Jan 2019
Prasophyllum tadgellianum at Kosciuszko National Park - 3 Jan 2019
Prasophyllum tadgellianum at Kosciuszko National Park - 3 Jan 2019

Identification history

Orchid Prasophyllum tadgellianum 14 Jan 2019 TobiasHayashi
Orchid Prasophyllum tadgellianum 12 Jan 2019 JackieMiles

Author's notes

A bit over 30cm. These two plants were growing close together, one yellow flowered with the leaf withered at flowering, one brownish flowered and the leaf not withered. I tried to make one of them sphacelatum, but I think the fact that the flowers are similarly crowded makes them both tadgellianum despite their differences.


MattM wrote:
   12 Jan 2019
I have just returned from a trip and found what I believe is P. sphacelatum. I'm certainly no expert, but based on the descriptions of the two species in the ACT orchid book it seems P. tadgellianum has petals that point forward, as in your images. The petals of P. sphacelatum don't point forward so much. It might be fun to compare your photos with my photos once I upload them.
   13 Jan 2019
Hmm, I put up a possible sphacelatum sighting too and the petals look similarly forward pointing on it (Unidentified on 3 Jan 2019). Still, the experts haven't had a crack at either of them yet, so we'll see. Prasos in general are a subtle bunch. Bit too subtle for me!
MattM wrote:
   13 Jan 2019
I agree with you there. As far as I am concerned a lot of them may as well be the same species.
CathB wrote:
   13 Jan 2019
I'm afraid I'm not familiar enough with them to be much help. Unless Tobias has some thoughts, I will consult further.
   14 Jan 2019
Yeah, I don't think there's an easy way to be sure with these two species. I had issues trying to id these a few years ago, and Mark Clements suggested that ones with larger, more spaced flowers were P sphacelatum. I'm not sure about the petals pointing forward or not, haven't heard that one before. Gary Backhouse in his Vic orchids ebook suggests that some individuals may not confidently be assigned to either, but that typical P sphacelatum are taller with more widespread flowers and P tadgellianum shorter plants with more crowded flowers. I'd be happy with P tadgellianum for these ones.

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Location information

Species information

  • Sensitive
  • Rare or uncommon Native
  • Non-Invasive

Sighting information

  • 2 Abundance
  • 3 Jan 2019 2:46 PM Recorded on
  • JackieMiles Recorded by
  • Website Reported via
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