Bushy Needlewood at Campbell, ACT
Identification history
| Hakea decurrens subsp. decurrens | 14 Oct 2018 | BettyDonWood | ||
| Hakea decurrens subsp. decurrens | 13 Oct 2018 | BettyDonWood |
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13 comments
MichaelMulvaney
wrote:
14 Jun 2015
Silke it is pretty hard to tell the invasive decurrens subspecies from that of physocarpa subspecies. This looks like Hakea decurrens subs'. physocarpa. The Flora of NSW identifies the two sub-species by the width of the pod and the width of pale wood when the pod is split in half. decurrens has a 14-19 wide pod and a pale wood zone in the pod of 3-6mm, while physocarpa has a 15-35mm wide pod and pale wood zone of 6-12mm. I leave it to you to confirm
MichaelMulvaney
wrote:
14 Jun 2015
Sorry Silke actually Hakea decurrens subs decurrens is the native subspecies and physocarpa the weedy one
SilkeSma
wrote:
14 Jun 2015
Thanks Michael, I was indeed wondering how to tell the decurrens apart. I'll go and do some measuring.
SilkeSma
wrote:
18 Jun 2015
Hi Michael, I had a look at some pods today. It's not entirely clear cut but but on average I'll go with the physocarpa subsp. The size of the pods is at the low end of physocarpa.
BettyDonWood
wrote:
28 Mar 2018
Sorry. I reversed the ID before reading the comments. Though three years down the track, with no other sightings of this subspecies, it might be an idea to find an open pod and redo the measurements. The place to do it is beside the seed cavity.
waltraud
wrote:
8 Oct 2018
Given there are large numbers of the local subsp decurrens further north I indeed wonder whether this is physocarpa.
Silke, would you be able to collect the fruits of this specimen? They will open after a couple of days and then you can carry out measurements as suggested by Betty.
Silke, would you be able to collect the fruits of this specimen? They will open after a couple of days and then you can carry out measurements as suggested by Betty.
SilkeSma
wrote:
14 Oct 2018
I've taken a photo of the seed pods with a ruler next to it. I still can't make up my mind. Over to the experts please.
BettyDonWood
wrote:
14 Oct 2018
I cannot remember why I thought it was subsp. physocarpa at the time. Presumably on the diameter of the nuts (follicles according to botanists). Having looked at the pale wood zone of the nuts (usually 6-12 mm wide in physocarpa, usually 3.5-6 mm wide in decurrens) and the outer layer (usually 2.5-5 mm wide in physocarpa, usually 1-2.5 mm wide in subsp. decurrens), and the fact that is extremely unlikely for the coastal subsp, physocarpa to have been planted in the ACT, I have decided it must be subsp. decurrens, the conmon subspecies in the ACT.
MichaelMulvaney
wrote:
15 Oct 2018
Thanks for being so persistent Silke and helping us come to the right ID
BettyDonWood
wrote:
15 Oct 2018
Everyone. The reason both suggested names are subsp. decurrens now and the dates the same is that I merged subsp. physocarpa into subsp. decurrens over the weekend, not realising that the background maintenance was down. Everything went pear shaped. Rohan has said he will try to fix it.
waltraud
wrote:
16 Oct 2018
Yes, these kind of things happen when working with huge mega data stuff. We all understand and are very grateful to the CNM background scewing team who work hard to get things running as amazingly smooth as possible.
Location information
- Coordinates 149.172246-35.274381
- Maps Mount Ainslie
- Places Campbell, ACT
Sighting information
- 4 - 15 Abundance
- 13 Oct 2018 04:08 PM Recorded on
- SilkeSma Recorded by
-
Collections
Plants Other Shrubs SilkeSma Canberra & Southern Tablelands NatureMapr
Additional information
- True In flower
Species information
- Hakea decurrens subsp. decurrens Scientific name
- Bushy Needlewood Common name
- Not Sensitive
- Local native
- Non-invasive or negligible
- Up to 809m Recorded at altitude
- Machine learning
-
In flower
- External link More information
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
