North Yilliminning reserve is 22 kilometres from Narrogin on the Narrogin-Kulin Road. The road roughly follows the ancient Binneringie dyke, which has been the catchment divide between the Hotham and Blackwood rivers for  hundreds of millions of years.
​Coming from Narrogin prepare to turn off into a rest bay under trees on the right, soon after passing Taylor Road. Armstrong road marks the eastern side of the reserve.

I didn't explore this reserve for years because initial forays showed a landscape that hadn't been burnt for decades. I saw areas littered by dead sheoaks, and bare areas because fire dependant plants had died out.
This changed in 2021 when I discovered the wide range of Cowslip /Little Pink Fairy orchids, which have multiple forms and colours. There was a devastating bushfire in 2022, and it is well worth visiting the reserve to see the amazing wildflower regeneration.
​This blog shows the large number and range of hybrids at this reserve.

 The best time to see the hybrids is about the third week of August and early September depending on the season. Interior track have been blocked following the March 2022 severe fire.
To see them park in the parking bay and walk up the hill from the picnic table to the closed road on the left (eastern) side. The hybrids begin over the ridge on a gentle sandy gravel slope. 
 Elsewhere these hybrids are uncommon (only two groups in Foxes Lair).
Orchid hybrids tend to be more common in spots where there are lots of one parent and fewer of another. Here cowslip orchids greatly outnumber little pink fairy orchids, and normally flower for much longer. I noticed that hybrids are much more common on shallow sandy gravel slopes, where soils hold less water than deep sands and sands over clay.  I think that hybidisation is enhanced by periodic water shortages. which reduce the flowering period in these soils. In drier seasons, the flowering period for the cowslips on these soils is shortened to that of earlier flowering little pink fairy orchids. Here pollinators are more likely to visit both species together and create hybids.
Hybrids are generally sterile, but expand asexually from root tubers into clumps.

I have a good sense of direction and love wandering through observing different patterns of regrowth and associated wildflowers and can use Google maps to find my position (Telstra phone), but some may get lost and stony gravel areas can be a bit hard on the ankles.
​The reserve is underlain by granite bedrock, mostly hidden under pale sandy, gravelly, and ironstone soils. Most of the reserve is a gently sloping upland with old and infertile soils. Topsoils on the ridges are stony and shallow, with white sandy topsoil on lower slopes and valleys. An old vegetation map of the reserve had colourful descriptions, such as 'poor wandoo' and 'useless plants and dryandra'.
Radiometric imagery has produced colours on the coloured photo, which show general soil types. Orange-brown indicates brownish fertile York gum, jam and rock sheoak soils. Green indicates gravels. Darker colours indicate paler and deeper sand. ​
A breakaway following the highway on the northern edge of the reserve is a contact zone between dolerite to the north (fertile york gum farm land), and granite (sandy soils) to the south. The breakaway originally has brown mallet and red morrel woodland with sparse understorey at its base and patchy lateritic woodland at the top.
​Now, the woodland is a mass of dead trees and vigourous regrowth.

There hadn't been a fire here for decades. In some areas before the fire, fallen trees (mostly sheoaks) made walking difficult, and plant diversity was reduced as fire dependant seeders have died out. Wow thing have changed now
There is attractive bushwalking country. Being a sandy block, there is a multitude of cowslip orchids. Litttle pink fairy orchids also occur with sugar, snail, greenhood, jug, and donkey orchids, and a patch of purple enamel orchids. Unlike many surrounding reserves there are very few spider orchids.
​Following images show regeneration in part of the reserve
1on  a stony sandy gravel slope on the northen side of the reserves where hybrids are most common.

2 The fire was not so severe in the red morrell valley, which had almost no understorey. It burnt the base of the trees and caused a leaf drop. Many trees have resprouted from the base and understorey seedlings are growing.

3 Wandoo - sheoak woodland on a north-south upland stony, sandy gravel plain bouded by a breakaway to the west was completely incinerated. many burnt wandoos are resprouting and there is a germination of seedlings, which will provide a rejuvenated understorey in a few years.

The eastern edge of the reserve has pockets of deep white sandy soil, which supports remnants of more westerly occurring plants. Of particular note are Jarrah, Candlestick Banksia Banksia attenuata, and Christmas Tree Nuytsia florabunda.The understorey containe some lovely plants;- Purple enamel orchids (October), stilit walker triggerplant Stylidium araeophyllum, Eremea pauciflora, and Calytrix flava.
The fire devastated the Jarrah and Banksia woodland, but the understorey is strongly regenerating (unfortunately including some weeds)

​Greetings fellow Foxies,
A wet winter has enabled me to see the root structure of Drosera bulbosa/red-leaved sundew. I see it in water-gaining red soil areas in Foxes Lair and in moss beds on or around granite outcrops. Leaf colour varies from green to yellow and red, the latter due to nitrogen deficiency when plants are waterlogged or stressed.

Rosette sundews such as this,survive over summer as a fleshy root tuber. In winter a fleshy stem called a rhizome emerges and grows to the surface where it develops roots and leaves​. At the end of the season, the top withers and dies as nutrients are drawn back into the tuber. Daughter tubers may then be produced, as a base for new plants.
Due to their location, these plants are at risk of being washed away or snapped off by running water, which undermines them or breaks off clumps of moss containing them. A plant below, which snapped of at the surface has developed another tuber to find soil and make new roots.

Images below show plants that were washed out of the soil with roots and tuber intact. One had an emptied tuber as its resouces were used to produce a rhizome in search of soil

​Greetings fellow Foxies,
I have been wandering around Foxes Lair since about 1990 but still make new discoveries. Last year i found a single leaping spider orchid (Caladenia macrostylis). Unfortunately, this beautiful double-header is in a public spot and was picked this year, I still pondering on protection measures. It is yet another of the Foxes Lair orchids, which is an only plant or in only one spot.

​This season I stumbled upon a group of lazy spider orchids (Caladenia multiclavia) in the district. They are amongst the most ornate orchids I have seen, particularly when the sun is behind them. They are also very hard to see in their natural habitat. While very carefully placing dead branches around to protect them, I inadvertently stepped on one. Their location will remain secret as they are locally rare.

​The lazy spider orchid's insect-shaped labellum indicates that it tricks flower wasps into pollinating them, as does the dragon orchid (Caladenia Barbarossa).
Even more exciting was a find in this reserve of the Bent Spider Orchid, which is a Caladenia multiclava /Caladenia polychroma hybrid 

​​The intriguing article below tells how spider orchid species could have evolved from general insect pollination to targetting flower wasps.

The article inspired me to collect images below of spider orchid flowers that show changes in glandular calli (raised, fleshy growths on the labellum) to resemble a female flower wasp more closely.

The ultimate is the flying duck orchid. I have discovered that there is a species in the district and hope to hunt it down next year.

​Another specialist is the elbow orchid Spiculaea ciliata, which flowers on and around granite outcrops