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Other ShrubGrevillea juniperina    

Grevillea at Pine Island to Point Hut

5 images

Grevillea juniperina at Pine Island to Point Hut - 17 Jul 2018
Grevillea juniperina at Pine Island to Point Hut - 17 Jul 2018
Grevillea juniperina at Pine Island to Point Hut - 17 Jul 2018
Grevillea juniperina at Pine Island to Point Hut - 17 Jul 2018
Grevillea juniperina at Pine Island to Point Hut - 17 Jul 2018

Identification history

Other Shrub Grevillea juniperina 23 Jul 2018 MichaelMulvaney1.1K
Other Shrub Grevillea juniperina 22 Jul 2018 michaelb5.9K

Significant sighting

michaelb5.9K noted:
23 Jul 2018

The number of these plants has increased from just a few 20 years ago to an alarming number of over 1000 at the moment. It is crowding out the smaller native shrubs and forbs. It can grow to up to three metres tall and the foliage is quite dense. It is significant because up to now the species has not been regarded as invasive. Also see comments.

Author's notes

Abundant on the east side of the Murrumbidgee River, south of Pine Island.

9 comments

michaelb5.9K wrote:
   23 Jul 2018
These photos were taken to show how dense the spread of this weedy species is along the river south of Pine Island. To the north of Pine Island is a similar spread. The small shrubs in the foreground are Leucopogon attenuatus and are being crowded out by the much larger grevillea.
michaelb5.9K wrote:
   Yesterday
While this sighting has been identified as Grevillea juniperina, it is not 100% accurate. The primary resemblance is to that species, but there is evidence of hybridising with other species including G. rosmarinifolia and G. lanigera. This has been verified by Rainer Rehwinkel, who describes the population as a "'hybrid swarm', showing the characteristic 'hybrid vigour'". While this sighting is to the south of Pine Island, note that the population extends to the north of Pine Island as well, covering quite a large area.
michaelb5.9K wrote:
   Yesterday
See Rainer Rehwinkel's FaceBook post which he recorded after I showed him to the site on 14 August 2018:
https://www.facebook.com/100004693938376/posts/1112998632199924/?comment_id=1113016548864799
rainer wrote:
   Yesterday
An article about this will appear in the next FOG newsletter. My Facebook post on the subject garnered many many well-informed comments. A general feeling of agreement has arisen and this is that the grevilleas should all be removed from this site. If resources for that are not available, then those populations impacting on the grassland (community r8) with the high density of Small-leaved Beard-heath (Leucopogon attenuatus) should be targeted as a priority.
michaelb5.9K wrote:
   Yesterday
Thanks Rainer. It is very good of you to bring this to public attention. The plant community to the north of Pine Island is different and may be worth checking out at a later date.
rainer wrote:
   Yesterday
I’m in MB. Anytime you want to have a look, I’ll be there!
MichaelMulvaney1.1K wrote:
   Yesterday
I sent these links to Darren Roso the ranger responsible for this area who replied
"‘just had a read. This is good work
Not quite as simple as that. The population explosion is a response to our rabbit control. True we do have hybrids there.
All the G.rosmanifolia X juniperinum “Canberra gem” can now go. There aren’t very many now. We have controlled the vast majority. That’s how we are aware of the hybrids. No one could tell us what they are hybrids of and they never seeded so we /I don’t attach any urgency.
But the G. lanigera X G. juniperinum are probably natural. And I argue tolerable. Simply a symptom of the massive population reduction during the sheep and rabbit years.
The G.rosmanifolia X juniperinum “Canberra gem” planted in the 80’s during the forward plantings are a problem and the amount to which they have expressed in the genetics…………..really hard to judge. As I mention above, they can go now that the Lanigera and juniperinum has recovered.
The G. juniperinum and lanigera are so important for our birds, since they bridge the Winter nectar gap, and are good nesting/refuge sites, that I propose a very careful removal program if at all. The suite of avi fauna of the Murrumbidgee is a remarkable thing and we should only very carefully manage habitat.
Control is not a big job. We are talking a 000 plants. Cut and dab with Glyphosate only. The vegetation here is very interesting and poorly known. And even more poorly understood.
Let me go have another look this week end………………….
cheers

Darren Roso
Senior Ranger - Murrumbidgee
michaelb5.9K wrote:
   Yesterday
What does Darren mean by "We are talking a 000 plants" ?
Mike2.3K wrote:
   Yesterday
I think he is talking about a thousand plants not an emergency.

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Nearby sightings

Leucopogon attenuatus at Pine Island to Point Hut - 17 Jul 2018 Myriophyllum verrucosum at Pine Island to Point Hut - 23 Feb 2017 Orthorhinus cylindrirostris at Pine Island to Point Hut - 12 Jan 2017 Eryngium ovinum at Pine Island to Point Hut - 8 Nov 2014 Xerochrysum viscosum at Pine Island to Point Hut - 8 Nov 2014 Grevillea juniperina at Pine Island to Point Hut - 8 Nov 2014 Wahlenbergia communis at Pine Island to Point Hut - 8 Nov 2014 Sorghum leiocladum at Pine Island to Point Hut - 8 Nov 2014 Calytrix tetragona at Pine Island to Point Hut - 8 Nov 2014 Daucus glochidiatus at Pine Island to Point Hut - 8 Nov 2014 Clania lewinii at Pine Island to Point Hut - 8 Nov 2014 Calytrix tetragona at Pine Island to Point Hut - 8 Nov 2014 Geranium retrorsum at Pine Island to Point Hut - 8 Nov 2014 Pomaderris angustifolia at Pine Island to Point Hut - 15 Oct 2014 Kunzea parvifolia at Pine Island to Point Hut - 15 Oct 2014 Triptilodiscus pygmaeus at Pine Island to Point Hut - 15 Oct 2014 Daviesia mimosoides at Pine Island to Point Hut - 13 Oct 2014 Themeda triandra at Pine Island to Point Hut - 25 Feb 2007
Leucopogon attenuatus at Pine Island to Point Hut - 17 Jul 2018
Myriophyllum verrucosum at Pine Island to Point Hut - 23 Feb 2017
Orthorhinus cylindrirostris at Pine Island to Point Hut - 12 Jan 2017
Eryngium ovinum at Pine Island to Point Hut - 8 Nov 2014
Xerochrysum viscosum at Pine Island to Point Hut - 8 Nov 2014
Grevillea juniperina at Pine Island to Point Hut - 8 Nov 2014
Wahlenbergia communis at Pine Island to Point Hut - 8 Nov 2014
Sorghum leiocladum at Pine Island to Point Hut - 8 Nov 2014
Calytrix tetragona at Pine Island to Point Hut - 8 Nov 2014
Daucus glochidiatus at Pine Island to Point Hut - 8 Nov 2014
Clania lewinii at Pine Island to Point Hut - 8 Nov 2014
Calytrix tetragona at Pine Island to Point Hut - 8 Nov 2014
Geranium retrorsum at Pine Island to Point Hut - 8 Nov 2014
Pomaderris angustifolia at Pine Island to Point Hut - 15 Oct 2014
Kunzea parvifolia at Pine Island to Point Hut - 15 Oct 2014
Triptilodiscus pygmaeus at Pine Island to Point Hut - 15 Oct 2014
Daviesia mimosoides at Pine Island to Point Hut - 13 Oct 2014
Themeda triandra at Pine Island to Point Hut - 25 Feb 2007

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Location information

Species information

  • Not Sensitive
  • Local Native
  • Non-Invasive

Sighting information

  • 1,001 - 10,000 Abundance
  • 17 Jul 2018 6:45 PM Recorded on
  • michaelb Recorded by
  • Website Reported via
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