Exploring Orchids at Dempster Head: A Local Hotspot

Dempster Head, Esperance, Western Australian Orchids

12/08/2025

A local orchid hotspot is the granite headland we call Dempster Head. We also refer to it as the Rotary Lookout for a very obvious reason!!
It being a beautiful, cloudless, sunny winters day, what better way to spent it than searching for the usual orchid suspects.

The first orchid found is the Mosquito orchid (Cyrtostylis robusta) which flower between June and August over a southerly range from Perth to Israelite Bay.
I located my orchids flowering under overhanding bushes on the walk trail edges. The ground hugging circular leaves grow in large numbers and are what you first notice. Then on a closer inspection you discover a few flowering specimens.


Snail orchids are also found scattered around the site. The exact species is difficult to name due to both Pterostylis voigtii and P. meridionalis named as growing in this region.
Both these orchids are smaller, grow in shallow soil pockets on granite outcrops, have bloated appearance, flared petals and slightly thickened lateral sepals.
Either they are the Eastern granite snail orchid or the Southern thick-sepaled snail orchid.
I have named as I believe them to be, however, any assistance in identifying these little guys would be appreciated.


Next up is an orchid that appears to have a restricted range in the Esperance region. The Spectacled donkey orchid (Diuris conspicillata) is listed as growing in shallow soil pockets on coastal granite outcrops in the Esperance area, which Dempster Head is an example of.
They get their name from the dark markings on the inner part of the labellum lateral lobes, which gives an impression of wearing glasses.
They are found scattered over Dempster Head usually in exposed areas but protected by a surrounding prickly shrub.


Another orchid with round ground hugging leaves is found, also growing underneath over hanging bushes.
The Crystal helmet orchid (Corysanthes limpida) is found from Walpole to Israelite Bay growing in sandy soils in coastal woodlands and shrublands.
When you come across the leaves you could mistake them for Mosquito orchids however the flowers are much shorter until they are fertilised, at which time the stem can extend up to 300mm in height.
Similarly to the Mosquito orchids, many leaves may be found but usually only a handful will produce flowers.


Not too bad a day with finding some orchids. Amazingly all orchids found belonged to a different genus.
Pterostylis, Cyrtostylis, Diuris and Corysanthes.

Amazingly I am posting this exactly 1 year later. Today however is not a beautiful fine sunny winters day, but a cold overcast winters day, hence I have time indoors to complete this post.

Orchid Species Found on the Great Ocean Trail

Esperance, List of Orchids Found, Western Australian Orchids
Signage at an intersection







Discovering Unique Orchids on Esperance’s Coast

Esperance, Pink Lake, Western Australian Orchids, Wind Farm


























View over Pink Lake

Exploring Orchids in Esperance: A Solo Adventure

Esperance, Helms Arboretum, List of Orchids Found, Myrup







Orchid season reset @ Helms Arboretum after Birthday Cruise

Esperance, Helms Arboretum, List of Orchids Found, Western Australian Orchids










28/07/2024 โ€ฆ.. A week spent wandering – Part 7

Gull Rock NP, Mount Martin Botanical Reserve, National Parks, Numerous days, Other Reserves, Road Trip, Western Australian Orchids











26/07/2023 โ€ฆ.. A week spent wandering – Part 5

National Parks, Torndirrup NP, Western Australian Orchids













04/09/2022 ….. Father’s Day Findings Pt. I

Dempster Head, Esperance, Western Australian Orchids

Father’s Day breakfast enjoyed at my son’s home with his little family. After stuffing ourselves, we all venture up to Dempster Head to walk off the excess joules. ๐Ÿ™‚ It is during our walk that we encounter the following orchids.


Often crossed lateral sepals

Spectacled donkey orchid (Diuris conspicillata)

Distribution & Habitat: Restricted to the Esperance area, growing in shallow soil pockets on coastal granite outcrops.

Up to 6 flowers per orchid

Stand up to 90mm in height.

Eastern granite snail orchid (Pterostylis voightii)

Distribution & Habitat: Found between Albany & Israelite Bay, growing in shallow soil pockets on granite outcrops.

Thickened lateral sepals.

Very long sepals

White spider orchid ?? (Caladenia sp.)

Unknown species of spider orchid.

Greenish tones to petals and sepals

Up to 3 flowers per orchid

Esperance white spider orchid (Caladenia crassa)

Distribution & Habitat: Found between Bremer Bay and Israelite Bay, growing in clay and sandy-clay soils in seasonally moist woodlands and shrublands. Flowers best in the season following summer fire.

Flowers are 80-140mm across

Standing 50-150mm in height

Western tiny blue orchid (Cyanicula aperta)

Distribution & Habitat: Found between Dumbleyung and Mt Ragged, growing in sandy, sandy-clay and lateritic soils in woodlands and scrublands.

Bluish-mauve flowers

Short spreading petals and sepals

Pink fairies (Caladenia latifolia)

Distribution & Habitat: Found between Kalbarri and Israelite Bay, growing in sandy and sandy-clay soils in forests, woodlands and shrublands. In inland areas the species grows on low rises beside salt lakes and occasionally on granite outcrops. Also found in SA, VIC and TAS.

Stand 120-450mm in height

Ground hugging leaf 20-30mm round

Crystal helmet orchid (Corybas limpidus) (Corysanthes limpidus)

Distribution & Habitat: Found between Walpole and Israelite Bay, growing in sandy soils in coastal woodlands and shrublands.

Green and burgundy blotched flower

Broad labellum

Mosquito orchid (Cyrtostylis robusta)

Distribution & Habitat: Found between Perth and Israelite Bay, growing in sandy, sandy-clay and granitic soils in forests, woodlands and shrublands. Northeast of Esperance the species occupies shallow soil pockets on granite outcrops.

Ground hugging leaf, 10-30mm round

Stands 250-500mm in height.

Esperance king spider orchid (Caladenia decora)

Distribution & Habitat: Found between Bremer Bay and Cape Arid, growing in sandy-clay and clay soils in woodlands and shrublands.

Four of more rows of calli

Saying goodbye to the kids, grandkids and Deb C, we head north for our next location. Here we check out the burnt patch north of Gibson.

08/08/2021 ….. Sunday afternoon coastal cache

Esperance, Western Australian Orchids, Wind Farm

Running solo again today as Deb has an afternoon shift. I decide to go back to the Wind Farm to see if the Bird orchids have flowered yet. I discovered many rosettes back on the 11/07/2021, so it’s been 4 weeks.

After parking up, I start at the left of the parking lot and find some snail orchids in flower. Very difficult to name snail orchids. The size of the rosette and it’s leaves, length of lateral sepals and plant height varied greatly so there may actually be at least 2 species. Possible options are the Coastal snail orchid (Pterostylis sp. “coastal snail”), Ravensthorpe snail orchid (Pterostylis grossa) or Thick-sepalled snail orchid (Pterostylis meridionalis).

I then started up the walking track and ran into a fellow orchid hunter, Kathy M. She was interested in the ID of a snail orchid she had found that had fawnish tones to it as well as one that seemed to have different rosette to others she had found. ID proves difficult and the species may be one of the previously listed options.

We spent quite a while checking out the Mosquito orchids (Cyrtostylis robusta) and the intermingled Bird orchid (Pterostylis sp.) rosettes, which unfortunately have yet to flower.

Kathy was going to check further down the road towards the coast, whilst I went into the scrub looking for the Pink fairy orchids (Caladenia latifolia) which Kathy had mentioned she had found. Three beautiful flowers found in full bloom. They were a very pale shade of pink, almost white in patches.

Flowering near the Pink fairies are some Curled tongue shell orchids (Pterostylis rogersii), which are a coastal shell orchid found from Binningup to Esperance.

I spend a few more minutes checking the area and come across further mosquito and shell orchids. I walk back to the car and head back towards the coast. A little ways down the track Kathy had parked up and was fossicking in the roadside scrub. I enquired if she had located much, to which she replied – there are some helmet orchids flowering. I pull over and take some photos of the small Crystal helmet orchid (Corybas limpidus) which flower during the period July to early September over a coastal range between Walpole and Esperance.

Other snail orchids found, which all have different features, which makes the task of identification very difficult. I have posted a flower and rosette shot for each distinct orchid and if you can provide any ideas on the likely identification, please do not hesitate to comment.

Now I head off to discover a new location to explore. Another orchid hunter Geoff R advised me of this location on Twilight Beach Road near Observatory Point. Pulling over onto the limestone I jump out and at once start exploring the low wind-swept coastal scrub. Firstly, had to watch my step as there are so many mosquito orchid leaves. Luckily I find one in flower as these orchids flower from June to August, so it is getting towards the end of their season.

Further into the scrub I come across some beautiful little snail orchids with dark sepals, both lateral and dorsal. Still can’t name these confusing little orchids. Moving back towards the car I find 3 Caladenia sp. orchids tempting me with there buds.

Along the vehicle track into the scrub, I come across many more snail orchids which only add to the confusion of ID.

Walking back however, I also discover some Banded greenhoods (Pterostylis vittata) still in flower. Closer to the Triton I push back into the scrub and are rewarded with a couple of Curled-tongue shell orchids, mosquito orchids and a Caladenia sp. orchid in bud.

3.47 pm so time to move on. Plan was to pop up to Dempster Head and see if the Spectacled donkey orchid was flowering, however I change my mind and pull into Chapmans Point instead. Nothing found on the lookout walk so just made my way down towards the point and checked out underneath shrubs and around the granite rocks.

Have a guess what I found first. That’s right, some more confusing snail orchids. Also found other mosquito orchids in flower. It was an amazing warm sunny winters afternoon, so finding the orchids that I have, just made the day even better. Now time for home.