Wickham's Grevillea or Arajukaljukua
- A shrub or small spindly tree.
- Size: 1 to 4 m tall.
- Leaves: Simple 2.5 to 9 cm long, 2.5 to 5.5 cm wide. They are distinctively pruinose (frosted in appearance) and the leaf margins are serrated and prickly.
- Flowers: Cream, yellow or red irregular flowers, they are mainly red in the Pilbara region.
- Fruit: Oblong or ellipsoidal, and glabrous (has no hairs).
What to Observe
- First fully open single flower
- Full flowering (record all days)
- End of flowering (when 95% of the flowers have faded)
- Not flowering
- Fruit fully ripened / berry reached full size (record all days)
ClimateWatch Science Advisor
We expect plants to start shooting and flowering earlier in the year as a result of climate change warming the Earth. They may also start appearing in new areas, as warmer temperatures enable them to live in environments that were previously too cold for them.
When To Look
- April to October
Where To Look
- Widespread in northern Western Australia, and inland regions of Northern Territory, South Australia and western Queensland.
- Look around sand or loam, stony or skeletal soils, laterite, sandstone, limestone, and quartzite. It can be found on sand dunes, plains, rocky hills & gullies, cliffs or ridges, along creek lines.
The map below displays the accumulated observations of these species as reported by ClimateWatch observers, together with the layer showing how the range of the species might change between now and 2085, with orange areas indicating where the species might disappear, and green areas where the species range might expand.
Woodley M et al. Wangalili Yindjibarndi and Ngarluma Plants. Juluwaru Aboriginal Corporation.
It is not easily mistaken for anything else.
Did You Know?
There are six recognised subspecies.
It is named after John Clements Wickham (1798 - 1864), 1st lieutenant on HMS Beagle 1831 - 36 (Darwin's expedition); commanded the ship in WA waters 1837 - 38; later government resident at Moreton Bay, Queensland.