Broad-sepaled Leafy Greenhood at suppressed
Identification history
| Bunochilus umbrinus (ACT) = Pterostylis umbrina (NSW) | 30 Aug 2021 | MattM | ||
| Bunochilus umbrinus (ACT) = Pterostylis umbrina (NSW) | 29 Aug 2021 | NedJohnston |
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User's notes
On one plant all of the flower heads were missing the orange and black thing in the middle. Not sure if this is just a developing plant or whether it formed unusually.
3 comments
MattM
wrote:
30 Aug 2021
The labellum is sensitive to vibrations and will flick up to force the pollinator against the pollinia as it tries to leave. You can see it in the first image. It's likely the labellum was triggered by a gust of wind or when you touched it. They are surprisingly sensitive.
NedJohnston
wrote:
30 Aug 2021
Wow, that's interesting. Is this a common thing among orchid species?
MattM
wrote:
30 Aug 2021
I believe it's a trait shared by all greenhoods. Off the top of my head I can't think of any other orchid species with a mechanism that responds to stimulus like that, but hammer the labellum of hammer orchids rocks back and forth as male flower wasps attempt to fly away and mate with the labellum (mistaken for the female). There are a couple of videos on YouTube showing the hammer orchid in action if you are curious about them.
Sighting information
- 1 Abundance
- NedJohnston Recorded by
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Collections
NedJohnston Canberra & Southern Tablelands NatureMapr Bunochilus umbrinus (ACT) = Pterostylis umbrina (NSW) Orchids Plants
Additional information
- 10cm to 30cm Plant height
- True In flower
Species information
- Bunochilus umbrinus (ACT) = Pterostylis umbrina (NSW) Scientific name
- Broad-sepaled Leafy Greenhood Common name
- Highly Sensitive
- Rare or uncommon native
- Non-invasive or negligible
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In flower
- External link More information
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Synonyms
Pterostylis umbrina Bunochilus umbrinus
Record quality
- Images or audio
- More than one media file
- Verified by an expert moderator
- Nearby sighting(s) of same species
- GPS evidence of location
- Description
- Additional attributes